Updating the Psoriatic Arthritis (PsA) Core Domain Set: A Report from the PsA Workshop at OMERACT 2016.
OBJECTIVE
To include the patient perspective in accordance with the Outcome Measures in Rheumatology (OMERACT) Filter 2.0 in the updated Psoriatic Arthritis (PsA) Core Domain Set for randomized controlled trials (RCT) and longitudinal observational studies (LOS).


METHODS
At OMERACT 2016, research conducted to update the PsA Core Domain Set was presented and discussed in breakout groups. The updated PsA Core Domain Set was voted on and endorsed by OMERACT participants.


RESULTS
We conducted a systematic literature review of domains measured in PsA RCT and LOS, and identified 24 domains. We conducted 24 focus groups with 130 patients from 7 countries representing 5 continents to identify patient domains. We achieved consensus through 2 rounds of separate surveys with 50 patients and 75 physicians, and a nominal group technique meeting with 12 patients and 12 physicians. We conducted a workshop and breakout groups at OMERACT 2016 in which findings were presented and discussed. The updated PsA Core Domain Set endorsed with 90% agreement by OMERACT 2016 participants included musculoskeletal disease activity, skin disease activity, fatigue, pain, patient's global assessment, physical function, health-related quality of life, and systemic inflammation, which were recommended for all RCT and LOS. These were important, but not required in all RCT and LOS: economic cost, emotional well-being, participation, and structural damage. Independence, sleep, stiffness, and treatment burden were on the research agenda.


CONCLUSIONS
The updated PsA Core Domain Set was endorsed at OMERACT 2016. Next steps for the PsA working group include evaluation of PsA outcome measures and development of a PsA Core Outcome Measurement Set.
From the Division of Rheumatology, Johns Hopkins University School of Medicine, Baltimore, Maryland; Rheumatology Research, Swedish Medical Center and University of Washington School of Medicine, Seattle, Washington; Department of Dermatology, University of Utah, Salt Lake City, Utah; Quintiles, Duke University School of Medicine, Durham, North Carolina; Division of Immunology, Stanford University, Palo Alto, California; Cleveland Clinic, Cleveland, Ohio; University of Pennsylvania, Philadelphia, Pennsylvania, USA; VU Medical Centre, Amsterdam; Department of Rheumatology, Leiden University Medical Center, Leiden, the Netherlands; Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin, Dublin, Ireland; Royal National Hospital for Rheumatic Diseases; Royal National Hospital for Rheumatic Diseases, Bath; Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds; Leeds Musculoskeletal Biomedical Research Unit, Leeds Teaching Hospitals UK National Health Service (NHS) Trust, Leeds, UK; Toronto Western Hospital; University of Toronto; Krembil Research Institute; Psoriatic Arthritis Program, University Health Network; Women's College Research Institute, Women's College Hospital, University of Toronto, Toronto; Ottawa Hospital Research Institute, School of Epidemiology, Public Health and Preventative Medicine, University of Ottawa, Ottawa, Ontario, Canada; Sorbonne Universités, UPMC Univ Paris 06, Institut Pierre Louis d'Epidémiologie et de Santé Publique, GRC-UPMC 08 (EEMOIS); AP-HP, Pitié Salpêtrière Hospital, Department of Rheumatology, Paris, France; The Parker Institute, Bispebjerg and Frederiksberg Hospital, Frederiksberg, Denmark; Department of Rheumatology and Immunology, Singapore General Hospital, Singapore; Department of Internal Medicine, Division of Rheumatology, Hacettepe University, Ankara, Turkey. aorbai1@jhmi.edu.|A.M. Orbai, MD, MHS, Division of Rheumatology, Johns Hopkins University School of Medicine; M. de Wit, PhD, Patient Research Partner, VU Medical Centre; P.J. Mease, MD, Rheumatology Research, Swedish Medical Center, and University of Washington School of Medicine; K. Callis Duffin, MD, Department of Dermatology, University of Utah; M. Elmamoun, MBBS, MRCPI, Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin; W. Tillett, BSc, MB ChB, PhD, MRCP, Royal National Hospital for Rheumatic Diseases; W. Campbell, BEd LLB, Patient Research Partner, Toronto Western Hospital; O. FitzGerald, MD, FRCPI, FRCP(UK), Newman Clinical Research Professor, Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin; D.D. Gladman, MD, FRCPC, Professor of Medicine, University of Toronto, and Senior Scientist, Krembil Research Institute, and Director, Psoriatic Arthritis Program, University Health Network; N. Goel, MD, Patient Research Partner, Quintiles, Duke University School of Medicine; L. Gossec, MD, PhD, Sorbonne Universités, UPMC Univ Paris 06, Institut Pierre Louis d'Epidémiologie et de Santé Publique, GRC-UPMC 08 (EEMOIS), and AP-HP, Pitié Salpêtrière Hospital, Department of Rheumatology; P. Hoejgaard, MD, The Parker Institute, Bispebjerg and Frederiksberg Hospital; Y.Y. Leung, MD, PhD, Department of Rheumatology and Immunology, Singapore General Hospital; C.A. Lindsay, PharmD, Patient Research Partner; V. Strand, MD, Division of Immunology, Stanford University; D.M. van der Heijde, MD, PhD, Department of Rheumatology, Leiden University Medical Center; B. Shea, MSc, PhD, Senior Methodologist, Ottawa Hospital Research Institute, Adjunct Professor, School of Epidemiology, Public Health and Preventative Medicine, Faculty of Medicine, University of Ottawa; R. Christensen, BSc, MSc, PhD, Head of Unit, Professor of Clinical Epidemiology, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; L. Coates, MB ChB, PhD, Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, and Leeds Musculoskeletal Biomedical Research Unit, Leeds Teaching Hospitals NHS Trust; L. Eder, MD, PhD, Women's College Research Institute, Women's College Hospital, University of Toronto; N. McHugh, MBChB, MD, FRCP, FRCPath, Royal National Hospital for Rheumatic Diseases; U. Kalyoncu, MD, Department of Internal Medicine, Division of Rheumatology, Hacettepe University; I. Steinkoenig, BA, Patient Research Partner, Cleveland Clinic; A. Ogdie, MD, MSCE, University of Pennsylvania. aorbai1@jhmi.edu.
Ana-Maria
AM
Orbai
From the Division of Rheumatology, Johns Hopkins University School of Medicine, Baltimore, Maryland; Rheumatology Research, Swedish Medical Center and University of Washington School of Medicine, Seattle, Washington; Department of Dermatology, University of Utah, Salt Lake City, Utah; Quintiles, Duke University School of Medicine, Durham, North Carolina; Division of Immunology, Stanford University, Palo Alto, California; Cleveland Clinic, Cleveland, Ohio; University of Pennsylvania, Philadelphia, Pennsylvania, USA; VU Medical Centre, Amsterdam; Department of Rheumatology, Leiden University Medical Center, Leiden, the Netherlands; Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin, Dublin, Ireland; Royal National Hospital for Rheumatic Diseases; Royal National Hospital for Rheumatic Diseases, Bath; Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds; Leeds Musculoskeletal Biomedical Research Unit, Leeds Teaching Hospitals UK National Health Service (NHS) Trust, Leeds, UK; Toronto Western Hospital; University of Toronto; Krembil Research Institute; Psoriatic Arthritis Program, University Health Network; Women's College Research Institute, Women's College Hospital, University of Toronto, Toronto; Ottawa Hospital Research Institute, School of Epidemiology, Public Health and Preventative Medicine, University of Ottawa, Ottawa, Ontario, Canada; Sorbonne Universités, UPMC Univ Paris 06, Institut Pierre Louis d'Epidémiologie et de Santé Publique, GRC-UPMC 08 (EEMOIS); AP-HP, Pitié Salpêtrière Hospital, Department of Rheumatology, Paris, France; The Parker Institute, Bispebjerg and Frederiksberg Hospital, Frederiksberg, Denmark; Department of Rheumatology and Immunology, Singapore General Hospital, Singapore; Department of Internal Medicine, Division of Rheumatology, Hacettepe University, Ankara, Turkey.|A.M. Orbai, MD, MHS, Division of Rheumatology, Johns Hopkins University School of Medicine; M. de Wit, PhD, Patient Research Partner, VU Medical Centre; P.J. Mease, MD, Rheumatology Research, Swedish Medical Center, and University of Washington School of Medicine; K. Callis Duffin, MD, Department of Dermatology, University of Utah; M. Elmamoun, MBBS, MRCPI, Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin; W. Tillett, BSc, MB ChB, PhD, MRCP, Royal National Hospital for Rheumatic Diseases; W. Campbell, BEd LLB, Patient Research Partner, Toronto Western Hospital; O. FitzGerald, MD, FRCPI, FRCP(UK), Newman Clinical Research Professor, Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin; D.D. Gladman, MD, FRCPC, Professor of Medicine, University of Toronto, and Senior Scientist, Krembil Research Institute, and Director, Psoriatic Arthritis Program, University Health Network; N. Goel, MD, Patient Research Partner, Quintiles, Duke University School of Medicine; L. Gossec, MD, PhD, Sorbonne Universités, UPMC Univ Paris 06, Institut Pierre Louis d'Epidémiologie et de Santé Publique, GRC-UPMC 08 (EEMOIS), and AP-HP, Pitié Salpêtrière Hospital, Department of Rheumatology; P. Hoejgaard, MD, The Parker Institute, Bispebjerg and Frederiksberg Hospital; Y.Y. Leung, MD, PhD, Department of Rheumatology and Immunology, Singapore General Hospital; C.A. Lindsay, PharmD, Patient Research Partner; V. Strand, MD, Division of Immunology, Stanford University; D.M. van der Heijde, MD, PhD, Department of Rheumatology, Leiden University Medical Center; B. Shea, MSc, PhD, Senior Methodologist, Ottawa Hospital Research Institute, Adjunct Professor, School of Epidemiology, Public Health and Preventative Medicine, Faculty of Medicine, University of Ottawa; R. Christensen, BSc, MSc, PhD, Head of Unit, Professor of Clinical Epidemiology, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; L. Coates, MB ChB, PhD, Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, and Leeds Musculoskeletal Biomedical Research Unit, Leeds Teaching Hospitals NHS Trust; L. Eder, MD, PhD, Women's College Research Institute, Women's College Hospital, University of Toronto; N. McHugh, MBChB, MD, FRCP, FRCPath, Royal National Hospital for Rheumatic Diseases; U. Kalyoncu, MD, Department of Internal Medicine, Division of Rheumatology, Hacettepe University; I. Steinkoenig, BA, Patient Research Partner, Cleveland Clinic; A. Ogdie, MD, MSCE, University of Pennsylvania.
Maarten
M
de Wit
From the Division of Rheumatology, Johns Hopkins University School of Medicine, Baltimore, Maryland; Rheumatology Research, Swedish Medical Center and University of Washington School of Medicine, Seattle, Washington; Department of Dermatology, University of Utah, Salt Lake City, Utah; Quintiles, Duke University School of Medicine, Durham, North Carolina; Division of Immunology, Stanford University, Palo Alto, California; Cleveland Clinic, Cleveland, Ohio; University of Pennsylvania, Philadelphia, Pennsylvania, USA; VU Medical Centre, Amsterdam; Department of Rheumatology, Leiden University Medical Center, Leiden, the Netherlands; Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin, Dublin, Ireland; Royal National Hospital for Rheumatic Diseases; Royal National Hospital for Rheumatic Diseases, Bath; Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds; Leeds Musculoskeletal Biomedical Research Unit, Leeds Teaching Hospitals UK National Health Service (NHS) Trust, Leeds, UK; Toronto Western Hospital; University of Toronto; Krembil Research Institute; Psoriatic Arthritis Program, University Health Network; Women's College Research Institute, Women's College Hospital, University of Toronto, Toronto; Ottawa Hospital Research Institute, School of Epidemiology, Public Health and Preventative Medicine, University of Ottawa, Ottawa, Ontario, Canada; Sorbonne Universités, UPMC Univ Paris 06, Institut Pierre Louis d'Epidémiologie et de Santé Publique, GRC-UPMC 08 (EEMOIS); AP-HP, Pitié Salpêtrière Hospital, Department of Rheumatology, Paris, France; The Parker Institute, Bispebjerg and Frederiksberg Hospital, Frederiksberg, Denmark; Department of Rheumatology and Immunology, Singapore General Hospital, Singapore; Department of Internal Medicine, Division of Rheumatology, Hacettepe University, Ankara, Turkey.|A.M. Orbai, MD, MHS, Division of Rheumatology, Johns Hopkins University School of Medicine; M. de Wit, PhD, Patient Research Partner, VU Medical Centre; P.J. Mease, MD, Rheumatology Research, Swedish Medical Center, and University of Washington School of Medicine; K. Callis Duffin, MD, Department of Dermatology, University of Utah; M. Elmamoun, MBBS, MRCPI, Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin; W. Tillett, BSc, MB ChB, PhD, MRCP, Royal National Hospital for Rheumatic Diseases; W. Campbell, BEd LLB, Patient Research Partner, Toronto Western Hospital; O. FitzGerald, MD, FRCPI, FRCP(UK), Newman Clinical Research Professor, Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin; D.D. Gladman, MD, FRCPC, Professor of Medicine, University of Toronto, and Senior Scientist, Krembil Research Institute, and Director, Psoriatic Arthritis Program, University Health Network; N. Goel, MD, Patient Research Partner, Quintiles, Duke University School of Medicine; L. Gossec, MD, PhD, Sorbonne Universités, UPMC Univ Paris 06, Institut Pierre Louis d'Epidémiologie et de Santé Publique, GRC-UPMC 08 (EEMOIS), and AP-HP, Pitié Salpêtrière Hospital, Department of Rheumatology; P. Hoejgaard, MD, The Parker Institute, Bispebjerg and Frederiksberg Hospital; Y.Y. Leung, MD, PhD, Department of Rheumatology and Immunology, Singapore General Hospital; C.A. Lindsay, PharmD, Patient Research Partner; V. Strand, MD, Division of Immunology, Stanford University; D.M. van der Heijde, MD, PhD, Department of Rheumatology, Leiden University Medical Center; B. Shea, MSc, PhD, Senior Methodologist, Ottawa Hospital Research Institute, Adjunct Professor, School of Epidemiology, Public Health and Preventative Medicine, Faculty of Medicine, University of Ottawa; R. Christensen, BSc, MSc, PhD, Head of Unit, Professor of Clinical Epidemiology, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; L. Coates, MB ChB, PhD, Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, and Leeds Musculoskeletal Biomedical Research Unit, Leeds Teaching Hospitals NHS Trust; L. Eder, MD, PhD, Women's College Research Institute, Women's College Hospital, University of Toronto; N. McHugh, MBChB, MD, FRCP, FRCPath, Royal National Hospital for Rheumatic Diseases; U. Kalyoncu, MD, Department of Internal Medicine, Division of Rheumatology, Hacettepe University; I. Steinkoenig, BA, Patient Research Partner, Cleveland Clinic; A. Ogdie, MD, MSCE, University of Pennsylvania.
Philip J
PJ
Mease
From the Division of Rheumatology, Johns Hopkins University School of Medicine, Baltimore, Maryland; Rheumatology Research, Swedish Medical Center and University of Washington School of Medicine, Seattle, Washington; Department of Dermatology, University of Utah, Salt Lake City, Utah; Quintiles, Duke University School of Medicine, Durham, North Carolina; Division of Immunology, Stanford University, Palo Alto, California; Cleveland Clinic, Cleveland, Ohio; University of Pennsylvania, Philadelphia, Pennsylvania, USA; VU Medical Centre, Amsterdam; Department of Rheumatology, Leiden University Medical Center, Leiden, the Netherlands; Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin, Dublin, Ireland; Royal National Hospital for Rheumatic Diseases; Royal National Hospital for Rheumatic Diseases, Bath; Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds; Leeds Musculoskeletal Biomedical Research Unit, Leeds Teaching Hospitals UK National Health Service (NHS) Trust, Leeds, UK; Toronto Western Hospital; University of Toronto; Krembil Research Institute; Psoriatic Arthritis Program, University Health Network; Women's College Research Institute, Women's College Hospital, University of Toronto, Toronto; Ottawa Hospital Research Institute, School of Epidemiology, Public Health and Preventative Medicine, University of Ottawa, Ottawa, Ontario, Canada; Sorbonne Universités, UPMC Univ Paris 06, Institut Pierre Louis d'Epidémiologie et de Santé Publique, GRC-UPMC 08 (EEMOIS); AP-HP, Pitié Salpêtrière Hospital, Department of Rheumatology, Paris, France; The Parker Institute, Bispebjerg and Frederiksberg Hospital, Frederiksberg, Denmark; Department of Rheumatology and Immunology, Singapore General Hospital, Singapore; Department of Internal Medicine, Division of Rheumatology, Hacettepe University, Ankara, Turkey.|A.M. Orbai, MD, MHS, Division of Rheumatology, Johns Hopkins University School of Medicine; M. de Wit, PhD, Patient Research Partner, VU Medical Centre; P.J. Mease, MD, Rheumatology Research, Swedish Medical Center, and University of Washington School of Medicine; K. Callis Duffin, MD, Department of Dermatology, University of Utah; M. Elmamoun, MBBS, MRCPI, Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin; W. Tillett, BSc, MB ChB, PhD, MRCP, Royal National Hospital for Rheumatic Diseases; W. Campbell, BEd LLB, Patient Research Partner, Toronto Western Hospital; O. FitzGerald, MD, FRCPI, FRCP(UK), Newman Clinical Research Professor, Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin; D.D. Gladman, MD, FRCPC, Professor of Medicine, University of Toronto, and Senior Scientist, Krembil Research Institute, and Director, Psoriatic Arthritis Program, University Health Network; N. Goel, MD, Patient Research Partner, Quintiles, Duke University School of Medicine; L. Gossec, MD, PhD, Sorbonne Universités, UPMC Univ Paris 06, Institut Pierre Louis d'Epidémiologie et de Santé Publique, GRC-UPMC 08 (EEMOIS), and AP-HP, Pitié Salpêtrière Hospital, Department of Rheumatology; P. Hoejgaard, MD, The Parker Institute, Bispebjerg and Frederiksberg Hospital; Y.Y. Leung, MD, PhD, Department of Rheumatology and Immunology, Singapore General Hospital; C.A. Lindsay, PharmD, Patient Research Partner; V. Strand, MD, Division of Immunology, Stanford University; D.M. van der Heijde, MD, PhD, Department of Rheumatology, Leiden University Medical Center; B. Shea, MSc, PhD, Senior Methodologist, Ottawa Hospital Research Institute, Adjunct Professor, School of Epidemiology, Public Health and Preventative Medicine, Faculty of Medicine, University of Ottawa; R. Christensen, BSc, MSc, PhD, Head of Unit, Professor of Clinical Epidemiology, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; L. Coates, MB ChB, PhD, Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, and Leeds Musculoskeletal Biomedical Research Unit, Leeds Teaching Hospitals NHS Trust; L. Eder, MD, PhD, Women's College Research Institute, Women's College Hospital, University of Toronto; N. McHugh, MBChB, MD, FRCP, FRCPath, Royal National Hospital for Rheumatic Diseases; U. Kalyoncu, MD, Department of Internal Medicine, Division of Rheumatology, Hacettepe University; I. Steinkoenig, BA, Patient Research Partner, Cleveland Clinic; A. Ogdie, MD, MSCE, University of Pennsylvania.
Kristina
K
Callis Duffin
From the Division of Rheumatology, Johns Hopkins University School of Medicine, Baltimore, Maryland; Rheumatology Research, Swedish Medical Center and University of Washington School of Medicine, Seattle, Washington; Department of Dermatology, University of Utah, Salt Lake City, Utah; Quintiles, Duke University School of Medicine, Durham, North Carolina; Division of Immunology, Stanford University, Palo Alto, California; Cleveland Clinic, Cleveland, Ohio; University of Pennsylvania, Philadelphia, Pennsylvania, USA; VU Medical Centre, Amsterdam; Department of Rheumatology, Leiden University Medical Center, Leiden, the Netherlands; Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin, Dublin, Ireland; Royal National Hospital for Rheumatic Diseases; Royal National Hospital for Rheumatic Diseases, Bath; Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds; Leeds Musculoskeletal Biomedical Research Unit, Leeds Teaching Hospitals UK National Health Service (NHS) Trust, Leeds, UK; Toronto Western Hospital; University of Toronto; Krembil Research Institute; Psoriatic Arthritis Program, University Health Network; Women's College Research Institute, Women's College Hospital, University of Toronto, Toronto; Ottawa Hospital Research Institute, School of Epidemiology, Public Health and Preventative Medicine, University of Ottawa, Ottawa, Ontario, Canada; Sorbonne Universités, UPMC Univ Paris 06, Institut Pierre Louis d'Epidémiologie et de Santé Publique, GRC-UPMC 08 (EEMOIS); AP-HP, Pitié Salpêtrière Hospital, Department of Rheumatology, Paris, France; The Parker Institute, Bispebjerg and Frederiksberg Hospital, Frederiksberg, Denmark; Department of Rheumatology and Immunology, Singapore General Hospital, Singapore; Department of Internal Medicine, Division of Rheumatology, Hacettepe University, Ankara, Turkey.|A.M. Orbai, MD, MHS, Division of Rheumatology, Johns Hopkins University School of Medicine; M. de Wit, PhD, Patient Research Partner, VU Medical Centre; P.J. Mease, MD, Rheumatology Research, Swedish Medical Center, and University of Washington School of Medicine; K. Callis Duffin, MD, Department of Dermatology, University of Utah; M. Elmamoun, MBBS, MRCPI, Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin; W. Tillett, BSc, MB ChB, PhD, MRCP, Royal National Hospital for Rheumatic Diseases; W. Campbell, BEd LLB, Patient Research Partner, Toronto Western Hospital; O. FitzGerald, MD, FRCPI, FRCP(UK), Newman Clinical Research Professor, Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin; D.D. Gladman, MD, FRCPC, Professor of Medicine, University of Toronto, and Senior Scientist, Krembil Research Institute, and Director, Psoriatic Arthritis Program, University Health Network; N. Goel, MD, Patient Research Partner, Quintiles, Duke University School of Medicine; L. Gossec, MD, PhD, Sorbonne Universités, UPMC Univ Paris 06, Institut Pierre Louis d'Epidémiologie et de Santé Publique, GRC-UPMC 08 (EEMOIS), and AP-HP, Pitié Salpêtrière Hospital, Department of Rheumatology; P. Hoejgaard, MD, The Parker Institute, Bispebjerg and Frederiksberg Hospital; Y.Y. Leung, MD, PhD, Department of Rheumatology and Immunology, Singapore General Hospital; C.A. Lindsay, PharmD, Patient Research Partner; V. Strand, MD, Division of Immunology, Stanford University; D.M. van der Heijde, MD, PhD, Department of Rheumatology, Leiden University Medical Center; B. Shea, MSc, PhD, Senior Methodologist, Ottawa Hospital Research Institute, Adjunct Professor, School of Epidemiology, Public Health and Preventative Medicine, Faculty of Medicine, University of Ottawa; R. Christensen, BSc, MSc, PhD, Head of Unit, Professor of Clinical Epidemiology, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; L. Coates, MB ChB, PhD, Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, and Leeds Musculoskeletal Biomedical Research Unit, Leeds Teaching Hospitals NHS Trust; L. Eder, MD, PhD, Women's College Research Institute, Women's College Hospital, University of Toronto; N. McHugh, MBChB, MD, FRCP, FRCPath, Royal National Hospital for Rheumatic Diseases; U. Kalyoncu, MD, Department of Internal Medicine, Division of Rheumatology, Hacettepe University; I. Steinkoenig, BA, Patient Research Partner, Cleveland Clinic; A. Ogdie, MD, MSCE, University of Pennsylvania.
Musaab
M
Elmamoun
From the Division of Rheumatology, Johns Hopkins University School of Medicine, Baltimore, Maryland; Rheumatology Research, Swedish Medical Center and University of Washington School of Medicine, Seattle, Washington; Department of Dermatology, University of Utah, Salt Lake City, Utah; Quintiles, Duke University School of Medicine, Durham, North Carolina; Division of Immunology, Stanford University, Palo Alto, California; Cleveland Clinic, Cleveland, Ohio; University of Pennsylvania, Philadelphia, Pennsylvania, USA; VU Medical Centre, Amsterdam; Department of Rheumatology, Leiden University Medical Center, Leiden, the Netherlands; Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin, Dublin, Ireland; Royal National Hospital for Rheumatic Diseases; Royal National Hospital for Rheumatic Diseases, Bath; Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds; Leeds Musculoskeletal Biomedical Research Unit, Leeds Teaching Hospitals UK National Health Service (NHS) Trust, Leeds, UK; Toronto Western Hospital; University of Toronto; Krembil Research Institute; Psoriatic Arthritis Program, University Health Network; Women's College Research Institute, Women's College Hospital, University of Toronto, Toronto; Ottawa Hospital Research Institute, School of Epidemiology, Public Health and Preventative Medicine, University of Ottawa, Ottawa, Ontario, Canada; Sorbonne Universités, UPMC Univ Paris 06, Institut Pierre Louis d'Epidémiologie et de Santé Publique, GRC-UPMC 08 (EEMOIS); AP-HP, Pitié Salpêtrière Hospital, Department of Rheumatology, Paris, France; The Parker Institute, Bispebjerg and Frederiksberg Hospital, Frederiksberg, Denmark; Department of Rheumatology and Immunology, Singapore General Hospital, Singapore; Department of Internal Medicine, Division of Rheumatology, Hacettepe University, Ankara, Turkey.|A.M. Orbai, MD, MHS, Division of Rheumatology, Johns Hopkins University School of Medicine; M. de Wit, PhD, Patient Research Partner, VU Medical Centre; P.J. Mease, MD, Rheumatology Research, Swedish Medical Center, and University of Washington School of Medicine; K. Callis Duffin, MD, Department of Dermatology, University of Utah; M. Elmamoun, MBBS, MRCPI, Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin; W. Tillett, BSc, MB ChB, PhD, MRCP, Royal National Hospital for Rheumatic Diseases; W. Campbell, BEd LLB, Patient Research Partner, Toronto Western Hospital; O. FitzGerald, MD, FRCPI, FRCP(UK), Newman Clinical Research Professor, Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin; D.D. Gladman, MD, FRCPC, Professor of Medicine, University of Toronto, and Senior Scientist, Krembil Research Institute, and Director, Psoriatic Arthritis Program, University Health Network; N. Goel, MD, Patient Research Partner, Quintiles, Duke University School of Medicine; L. Gossec, MD, PhD, Sorbonne Universités, UPMC Univ Paris 06, Institut Pierre Louis d'Epidémiologie et de Santé Publique, GRC-UPMC 08 (EEMOIS), and AP-HP, Pitié Salpêtrière Hospital, Department of Rheumatology; P. Hoejgaard, MD, The Parker Institute, Bispebjerg and Frederiksberg Hospital; Y.Y. Leung, MD, PhD, Department of Rheumatology and Immunology, Singapore General Hospital; C.A. Lindsay, PharmD, Patient Research Partner; V. Strand, MD, Division of Immunology, Stanford University; D.M. van der Heijde, MD, PhD, Department of Rheumatology, Leiden University Medical Center; B. Shea, MSc, PhD, Senior Methodologist, Ottawa Hospital Research Institute, Adjunct Professor, School of Epidemiology, Public Health and Preventative Medicine, Faculty of Medicine, University of Ottawa; R. Christensen, BSc, MSc, PhD, Head of Unit, Professor of Clinical Epidemiology, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; L. Coates, MB ChB, PhD, Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, and Leeds Musculoskeletal Biomedical Research Unit, Leeds Teaching Hospitals NHS Trust; L. Eder, MD, PhD, Women's College Research Institute, Women's College Hospital, University of Toronto; N. McHugh, MBChB, MD, FRCP, FRCPath, Royal National Hospital for Rheumatic Diseases; U. Kalyoncu, MD, Department of Internal Medicine, Division of Rheumatology, Hacettepe University; I. Steinkoenig, BA, Patient Research Partner, Cleveland Clinic; A. Ogdie, MD, MSCE, University of Pennsylvania.
William
W
Tillett
From the Division of Rheumatology, Johns Hopkins University School of Medicine, Baltimore, Maryland; Rheumatology Research, Swedish Medical Center and University of Washington School of Medicine, Seattle, Washington; Department of Dermatology, University of Utah, Salt Lake City, Utah; Quintiles, Duke University School of Medicine, Durham, North Carolina; Division of Immunology, Stanford University, Palo Alto, California; Cleveland Clinic, Cleveland, Ohio; University of Pennsylvania, Philadelphia, Pennsylvania, USA; VU Medical Centre, Amsterdam; Department of Rheumatology, Leiden University Medical Center, Leiden, the Netherlands; Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin, Dublin, Ireland; Royal National Hospital for Rheumatic Diseases; Royal National Hospital for Rheumatic Diseases, Bath; Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds; Leeds Musculoskeletal Biomedical Research Unit, Leeds Teaching Hospitals UK National Health Service (NHS) Trust, Leeds, UK; Toronto Western Hospital; University of Toronto; Krembil Research Institute; Psoriatic Arthritis Program, University Health Network; Women's College Research Institute, Women's College Hospital, University of Toronto, Toronto; Ottawa Hospital Research Institute, School of Epidemiology, Public Health and Preventative Medicine, University of Ottawa, Ottawa, Ontario, Canada; Sorbonne Universités, UPMC Univ Paris 06, Institut Pierre Louis d'Epidémiologie et de Santé Publique, GRC-UPMC 08 (EEMOIS); AP-HP, Pitié Salpêtrière Hospital, Department of Rheumatology, Paris, France; The Parker Institute, Bispebjerg and Frederiksberg Hospital, Frederiksberg, Denmark; Department of Rheumatology and Immunology, Singapore General Hospital, Singapore; Department of Internal Medicine, Division of Rheumatology, Hacettepe University, Ankara, Turkey.|A.M. Orbai, MD, MHS, Division of Rheumatology, Johns Hopkins University School of Medicine; M. de Wit, PhD, Patient Research Partner, VU Medical Centre; P.J. Mease, MD, Rheumatology Research, Swedish Medical Center, and University of Washington School of Medicine; K. Callis Duffin, MD, Department of Dermatology, University of Utah; M. Elmamoun, MBBS, MRCPI, Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin; W. Tillett, BSc, MB ChB, PhD, MRCP, Royal National Hospital for Rheumatic Diseases; W. Campbell, BEd LLB, Patient Research Partner, Toronto Western Hospital; O. FitzGerald, MD, FRCPI, FRCP(UK), Newman Clinical Research Professor, Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin; D.D. Gladman, MD, FRCPC, Professor of Medicine, University of Toronto, and Senior Scientist, Krembil Research Institute, and Director, Psoriatic Arthritis Program, University Health Network; N. Goel, MD, Patient Research Partner, Quintiles, Duke University School of Medicine; L. Gossec, MD, PhD, Sorbonne Universités, UPMC Univ Paris 06, Institut Pierre Louis d'Epidémiologie et de Santé Publique, GRC-UPMC 08 (EEMOIS), and AP-HP, Pitié Salpêtrière Hospital, Department of Rheumatology; P. Hoejgaard, MD, The Parker Institute, Bispebjerg and Frederiksberg Hospital; Y.Y. Leung, MD, PhD, Department of Rheumatology and Immunology, Singapore General Hospital; C.A. Lindsay, PharmD, Patient Research Partner; V. Strand, MD, Division of Immunology, Stanford University; D.M. van der Heijde, MD, PhD, Department of Rheumatology, Leiden University Medical Center; B. Shea, MSc, PhD, Senior Methodologist, Ottawa Hospital Research Institute, Adjunct Professor, School of Epidemiology, Public Health and Preventative Medicine, Faculty of Medicine, University of Ottawa; R. Christensen, BSc, MSc, PhD, Head of Unit, Professor of Clinical Epidemiology, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; L. Coates, MB ChB, PhD, Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, and Leeds Musculoskeletal Biomedical Research Unit, Leeds Teaching Hospitals NHS Trust; L. Eder, MD, PhD, Women's College Research Institute, Women's College Hospital, University of Toronto; N. McHugh, MBChB, MD, FRCP, FRCPath, Royal National Hospital for Rheumatic Diseases; U. Kalyoncu, MD, Department of Internal Medicine, Division of Rheumatology, Hacettepe University; I. Steinkoenig, BA, Patient Research Partner, Cleveland Clinic; A. Ogdie, MD, MSCE, University of Pennsylvania.
Willemina
W
Campbell
From the Division of Rheumatology, Johns Hopkins University School of Medicine, Baltimore, Maryland; Rheumatology Research, Swedish Medical Center and University of Washington School of Medicine, Seattle, Washington; Department of Dermatology, University of Utah, Salt Lake City, Utah; Quintiles, Duke University School of Medicine, Durham, North Carolina; Division of Immunology, Stanford University, Palo Alto, California; Cleveland Clinic, Cleveland, Ohio; University of Pennsylvania, Philadelphia, Pennsylvania, USA; VU Medical Centre, Amsterdam; Department of Rheumatology, Leiden University Medical Center, Leiden, the Netherlands; Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin, Dublin, Ireland; Royal National Hospital for Rheumatic Diseases; Royal National Hospital for Rheumatic Diseases, Bath; Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds; Leeds Musculoskeletal Biomedical Research Unit, Leeds Teaching Hospitals UK National Health Service (NHS) Trust, Leeds, UK; Toronto Western Hospital; University of Toronto; Krembil Research Institute; Psoriatic Arthritis Program, University Health Network; Women's College Research Institute, Women's College Hospital, University of Toronto, Toronto; Ottawa Hospital Research Institute, School of Epidemiology, Public Health and Preventative Medicine, University of Ottawa, Ottawa, Ontario, Canada; Sorbonne Universités, UPMC Univ Paris 06, Institut Pierre Louis d'Epidémiologie et de Santé Publique, GRC-UPMC 08 (EEMOIS); AP-HP, Pitié Salpêtrière Hospital, Department of Rheumatology, Paris, France; The Parker Institute, Bispebjerg and Frederiksberg Hospital, Frederiksberg, Denmark; Department of Rheumatology and Immunology, Singapore General Hospital, Singapore; Department of Internal Medicine, Division of Rheumatology, Hacettepe University, Ankara, Turkey.|A.M. Orbai, MD, MHS, Division of Rheumatology, Johns Hopkins University School of Medicine; M. de Wit, PhD, Patient Research Partner, VU Medical Centre; P.J. Mease, MD, Rheumatology Research, Swedish Medical Center, and University of Washington School of Medicine; K. Callis Duffin, MD, Department of Dermatology, University of Utah; M. Elmamoun, MBBS, MRCPI, Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin; W. Tillett, BSc, MB ChB, PhD, MRCP, Royal National Hospital for Rheumatic Diseases; W. Campbell, BEd LLB, Patient Research Partner, Toronto Western Hospital; O. FitzGerald, MD, FRCPI, FRCP(UK), Newman Clinical Research Professor, Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin; D.D. Gladman, MD, FRCPC, Professor of Medicine, University of Toronto, and Senior Scientist, Krembil Research Institute, and Director, Psoriatic Arthritis Program, University Health Network; N. Goel, MD, Patient Research Partner, Quintiles, Duke University School of Medicine; L. Gossec, MD, PhD, Sorbonne Universités, UPMC Univ Paris 06, Institut Pierre Louis d'Epidémiologie et de Santé Publique, GRC-UPMC 08 (EEMOIS), and AP-HP, Pitié Salpêtrière Hospital, Department of Rheumatology; P. Hoejgaard, MD, The Parker Institute, Bispebjerg and Frederiksberg Hospital; Y.Y. Leung, MD, PhD, Department of Rheumatology and Immunology, Singapore General Hospital; C.A. Lindsay, PharmD, Patient Research Partner; V. Strand, MD, Division of Immunology, Stanford University; D.M. van der Heijde, MD, PhD, Department of Rheumatology, Leiden University Medical Center; B. Shea, MSc, PhD, Senior Methodologist, Ottawa Hospital Research Institute, Adjunct Professor, School of Epidemiology, Public Health and Preventative Medicine, Faculty of Medicine, University of Ottawa; R. Christensen, BSc, MSc, PhD, Head of Unit, Professor of Clinical Epidemiology, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; L. Coates, MB ChB, PhD, Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, and Leeds Musculoskeletal Biomedical Research Unit, Leeds Teaching Hospitals NHS Trust; L. Eder, MD, PhD, Women's College Research Institute, Women's College Hospital, University of Toronto; N. McHugh, MBChB, MD, FRCP, FRCPath, Royal National Hospital for Rheumatic Diseases; U. Kalyoncu, MD, Department of Internal Medicine, Division of Rheumatology, Hacettepe University; I. Steinkoenig, BA, Patient Research Partner, Cleveland Clinic; A. Ogdie, MD, MSCE, University of Pennsylvania.
Oliver
O
FitzGerald
From the Division of Rheumatology, Johns Hopkins University School of Medicine, Baltimore, Maryland; Rheumatology Research, Swedish Medical Center and University of Washington School of Medicine, Seattle, Washington; Department of Dermatology, University of Utah, Salt Lake City, Utah; Quintiles, Duke University School of Medicine, Durham, North Carolina; Division of Immunology, Stanford University, Palo Alto, California; Cleveland Clinic, Cleveland, Ohio; University of Pennsylvania, Philadelphia, Pennsylvania, USA; VU Medical Centre, Amsterdam; Department of Rheumatology, Leiden University Medical Center, Leiden, the Netherlands; Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin, Dublin, Ireland; Royal National Hospital for Rheumatic Diseases; Royal National Hospital for Rheumatic Diseases, Bath; Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds; Leeds Musculoskeletal Biomedical Research Unit, Leeds Teaching Hospitals UK National Health Service (NHS) Trust, Leeds, UK; Toronto Western Hospital; University of Toronto; Krembil Research Institute; Psoriatic Arthritis Program, University Health Network; Women's College Research Institute, Women's College Hospital, University of Toronto, Toronto; Ottawa Hospital Research Institute, School of Epidemiology, Public Health and Preventative Medicine, University of Ottawa, Ottawa, Ontario, Canada; Sorbonne Universités, UPMC Univ Paris 06, Institut Pierre Louis d'Epidémiologie et de Santé Publique, GRC-UPMC 08 (EEMOIS); AP-HP, Pitié Salpêtrière Hospital, Department of Rheumatology, Paris, France; The Parker Institute, Bispebjerg and Frederiksberg Hospital, Frederiksberg, Denmark; Department of Rheumatology and Immunology, Singapore General Hospital, Singapore; Department of Internal Medicine, Division of Rheumatology, Hacettepe University, Ankara, Turkey.|A.M. Orbai, MD, MHS, Division of Rheumatology, Johns Hopkins University School of Medicine; M. de Wit, PhD, Patient Research Partner, VU Medical Centre; P.J. Mease, MD, Rheumatology Research, Swedish Medical Center, and University of Washington School of Medicine; K. Callis Duffin, MD, Department of Dermatology, University of Utah; M. Elmamoun, MBBS, MRCPI, Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin; W. Tillett, BSc, MB ChB, PhD, MRCP, Royal National Hospital for Rheumatic Diseases; W. Campbell, BEd LLB, Patient Research Partner, Toronto Western Hospital; O. FitzGerald, MD, FRCPI, FRCP(UK), Newman Clinical Research Professor, Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin; D.D. Gladman, MD, FRCPC, Professor of Medicine, University of Toronto, and Senior Scientist, Krembil Research Institute, and Director, Psoriatic Arthritis Program, University Health Network; N. Goel, MD, Patient Research Partner, Quintiles, Duke University School of Medicine; L. Gossec, MD, PhD, Sorbonne Universités, UPMC Univ Paris 06, Institut Pierre Louis d'Epidémiologie et de Santé Publique, GRC-UPMC 08 (EEMOIS), and AP-HP, Pitié Salpêtrière Hospital, Department of Rheumatology; P. Hoejgaard, MD, The Parker Institute, Bispebjerg and Frederiksberg Hospital; Y.Y. Leung, MD, PhD, Department of Rheumatology and Immunology, Singapore General Hospital; C.A. Lindsay, PharmD, Patient Research Partner; V. Strand, MD, Division of Immunology, Stanford University; D.M. van der Heijde, MD, PhD, Department of Rheumatology, Leiden University Medical Center; B. Shea, MSc, PhD, Senior Methodologist, Ottawa Hospital Research Institute, Adjunct Professor, School of Epidemiology, Public Health and Preventative Medicine, Faculty of Medicine, University of Ottawa; R. Christensen, BSc, MSc, PhD, Head of Unit, Professor of Clinical Epidemiology, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; L. Coates, MB ChB, PhD, Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, and Leeds Musculoskeletal Biomedical Research Unit, Leeds Teaching Hospitals NHS Trust; L. Eder, MD, PhD, Women's College Research Institute, Women's College Hospital, University of Toronto; N. McHugh, MBChB, MD, FRCP, FRCPath, Royal National Hospital for Rheumatic Diseases; U. Kalyoncu, MD, Department of Internal Medicine, Division of Rheumatology, Hacettepe University; I. Steinkoenig, BA, Patient Research Partner, Cleveland Clinic; A. Ogdie, MD, MSCE, University of Pennsylvania.
Dafna D
DD
Gladman
From the Division of Rheumatology, Johns Hopkins University School of Medicine, Baltimore, Maryland; Rheumatology Research, Swedish Medical Center and University of Washington School of Medicine, Seattle, Washington; Department of Dermatology, University of Utah, Salt Lake City, Utah; Quintiles, Duke University School of Medicine, Durham, North Carolina; Division of Immunology, Stanford University, Palo Alto, California; Cleveland Clinic, Cleveland, Ohio; University of Pennsylvania, Philadelphia, Pennsylvania, USA; VU Medical Centre, Amsterdam; Department of Rheumatology, Leiden University Medical Center, Leiden, the Netherlands; Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin, Dublin, Ireland; Royal National Hospital for Rheumatic Diseases; Royal National Hospital for Rheumatic Diseases, Bath; Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds; Leeds Musculoskeletal Biomedical Research Unit, Leeds Teaching Hospitals UK National Health Service (NHS) Trust, Leeds, UK; Toronto Western Hospital; University of Toronto; Krembil Research Institute; Psoriatic Arthritis Program, University Health Network; Women's College Research Institute, Women's College Hospital, University of Toronto, Toronto; Ottawa Hospital Research Institute, School of Epidemiology, Public Health and Preventative Medicine, University of Ottawa, Ottawa, Ontario, Canada; Sorbonne Universités, UPMC Univ Paris 06, Institut Pierre Louis d'Epidémiologie et de Santé Publique, GRC-UPMC 08 (EEMOIS); AP-HP, Pitié Salpêtrière Hospital, Department of Rheumatology, Paris, France; The Parker Institute, Bispebjerg and Frederiksberg Hospital, Frederiksberg, Denmark; Department of Rheumatology and Immunology, Singapore General Hospital, Singapore; Department of Internal Medicine, Division of Rheumatology, Hacettepe University, Ankara, Turkey.|A.M. Orbai, MD, MHS, Division of Rheumatology, Johns Hopkins University School of Medicine; M. de Wit, PhD, Patient Research Partner, VU Medical Centre; P.J. Mease, MD, Rheumatology Research, Swedish Medical Center, and University of Washington School of Medicine; K. Callis Duffin, MD, Department of Dermatology, University of Utah; M. Elmamoun, MBBS, MRCPI, Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin; W. Tillett, BSc, MB ChB, PhD, MRCP, Royal National Hospital for Rheumatic Diseases; W. Campbell, BEd LLB, Patient Research Partner, Toronto Western Hospital; O. FitzGerald, MD, FRCPI, FRCP(UK), Newman Clinical Research Professor, Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin; D.D. Gladman, MD, FRCPC, Professor of Medicine, University of Toronto, and Senior Scientist, Krembil Research Institute, and Director, Psoriatic Arthritis Program, University Health Network; N. Goel, MD, Patient Research Partner, Quintiles, Duke University School of Medicine; L. Gossec, MD, PhD, Sorbonne Universités, UPMC Univ Paris 06, Institut Pierre Louis d'Epidémiologie et de Santé Publique, GRC-UPMC 08 (EEMOIS), and AP-HP, Pitié Salpêtrière Hospital, Department of Rheumatology; P. Hoejgaard, MD, The Parker Institute, Bispebjerg and Frederiksberg Hospital; Y.Y. Leung, MD, PhD, Department of Rheumatology and Immunology, Singapore General Hospital; C.A. Lindsay, PharmD, Patient Research Partner; V. Strand, MD, Division of Immunology, Stanford University; D.M. van der Heijde, MD, PhD, Department of Rheumatology, Leiden University Medical Center; B. Shea, MSc, PhD, Senior Methodologist, Ottawa Hospital Research Institute, Adjunct Professor, School of Epidemiology, Public Health and Preventative Medicine, Faculty of Medicine, University of Ottawa; R. Christensen, BSc, MSc, PhD, Head of Unit, Professor of Clinical Epidemiology, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; L. Coates, MB ChB, PhD, Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, and Leeds Musculoskeletal Biomedical Research Unit, Leeds Teaching Hospitals NHS Trust; L. Eder, MD, PhD, Women's College Research Institute, Women's College Hospital, University of Toronto; N. McHugh, MBChB, MD, FRCP, FRCPath, Royal National Hospital for Rheumatic Diseases; U. Kalyoncu, MD, Department of Internal Medicine, Division of Rheumatology, Hacettepe University; I. Steinkoenig, BA, Patient Research Partner, Cleveland Clinic; A. Ogdie, MD, MSCE, University of Pennsylvania.
Niti
N
Goel
From the Division of Rheumatology, Johns Hopkins University School of Medicine, Baltimore, Maryland; Rheumatology Research, Swedish Medical Center and University of Washington School of Medicine, Seattle, Washington; Department of Dermatology, University of Utah, Salt Lake City, Utah; Quintiles, Duke University School of Medicine, Durham, North Carolina; Division of Immunology, Stanford University, Palo Alto, California; Cleveland Clinic, Cleveland, Ohio; University of Pennsylvania, Philadelphia, Pennsylvania, USA; VU Medical Centre, Amsterdam; Department of Rheumatology, Leiden University Medical Center, Leiden, the Netherlands; Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin, Dublin, Ireland; Royal National Hospital for Rheumatic Diseases; Royal National Hospital for Rheumatic Diseases, Bath; Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds; Leeds Musculoskeletal Biomedical Research Unit, Leeds Teaching Hospitals UK National Health Service (NHS) Trust, Leeds, UK; Toronto Western Hospital; University of Toronto; Krembil Research Institute; Psoriatic Arthritis Program, University Health Network; Women's College Research Institute, Women's College Hospital, University of Toronto, Toronto; Ottawa Hospital Research Institute, School of Epidemiology, Public Health and Preventative Medicine, University of Ottawa, Ottawa, Ontario, Canada; Sorbonne Universités, UPMC Univ Paris 06, Institut Pierre Louis d'Epidémiologie et de Santé Publique, GRC-UPMC 08 (EEMOIS); AP-HP, Pitié Salpêtrière Hospital, Department of Rheumatology, Paris, France; The Parker Institute, Bispebjerg and Frederiksberg Hospital, Frederiksberg, Denmark; Department of Rheumatology and Immunology, Singapore General Hospital, Singapore; Department of Internal Medicine, Division of Rheumatology, Hacettepe University, Ankara, Turkey.|A.M. Orbai, MD, MHS, Division of Rheumatology, Johns Hopkins University School of Medicine; M. de Wit, PhD, Patient Research Partner, VU Medical Centre; P.J. Mease, MD, Rheumatology Research, Swedish Medical Center, and University of Washington School of Medicine; K. Callis Duffin, MD, Department of Dermatology, University of Utah; M. Elmamoun, MBBS, MRCPI, Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin; W. Tillett, BSc, MB ChB, PhD, MRCP, Royal National Hospital for Rheumatic Diseases; W. Campbell, BEd LLB, Patient Research Partner, Toronto Western Hospital; O. FitzGerald, MD, FRCPI, FRCP(UK), Newman Clinical Research Professor, Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin; D.D. Gladman, MD, FRCPC, Professor of Medicine, University of Toronto, and Senior Scientist, Krembil Research Institute, and Director, Psoriatic Arthritis Program, University Health Network; N. Goel, MD, Patient Research Partner, Quintiles, Duke University School of Medicine; L. Gossec, MD, PhD, Sorbonne Universités, UPMC Univ Paris 06, Institut Pierre Louis d'Epidémiologie et de Santé Publique, GRC-UPMC 08 (EEMOIS), and AP-HP, Pitié Salpêtrière Hospital, Department of Rheumatology; P. Hoejgaard, MD, The Parker Institute, Bispebjerg and Frederiksberg Hospital; Y.Y. Leung, MD, PhD, Department of Rheumatology and Immunology, Singapore General Hospital; C.A. Lindsay, PharmD, Patient Research Partner; V. Strand, MD, Division of Immunology, Stanford University; D.M. van der Heijde, MD, PhD, Department of Rheumatology, Leiden University Medical Center; B. Shea, MSc, PhD, Senior Methodologist, Ottawa Hospital Research Institute, Adjunct Professor, School of Epidemiology, Public Health and Preventative Medicine, Faculty of Medicine, University of Ottawa; R. Christensen, BSc, MSc, PhD, Head of Unit, Professor of Clinical Epidemiology, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; L. Coates, MB ChB, PhD, Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, and Leeds Musculoskeletal Biomedical Research Unit, Leeds Teaching Hospitals NHS Trust; L. Eder, MD, PhD, Women's College Research Institute, Women's College Hospital, University of Toronto; N. McHugh, MBChB, MD, FRCP, FRCPath, Royal National Hospital for Rheumatic Diseases; U. Kalyoncu, MD, Department of Internal Medicine, Division of Rheumatology, Hacettepe University; I. Steinkoenig, BA, Patient Research Partner, Cleveland Clinic; A. Ogdie, MD, MSCE, University of Pennsylvania.
Laure
L
Gossec
From the Division of Rheumatology, Johns Hopkins University School of Medicine, Baltimore, Maryland; Rheumatology Research, Swedish Medical Center and University of Washington School of Medicine, Seattle, Washington; Department of Dermatology, University of Utah, Salt Lake City, Utah; Quintiles, Duke University School of Medicine, Durham, North Carolina; Division of Immunology, Stanford University, Palo Alto, California; Cleveland Clinic, Cleveland, Ohio; University of Pennsylvania, Philadelphia, Pennsylvania, USA; VU Medical Centre, Amsterdam; Department of Rheumatology, Leiden University Medical Center, Leiden, the Netherlands; Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin, Dublin, Ireland; Royal National Hospital for Rheumatic Diseases; Royal National Hospital for Rheumatic Diseases, Bath; Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds; Leeds Musculoskeletal Biomedical Research Unit, Leeds Teaching Hospitals UK National Health Service (NHS) Trust, Leeds, UK; Toronto Western Hospital; University of Toronto; Krembil Research Institute; Psoriatic Arthritis Program, University Health Network; Women's College Research Institute, Women's College Hospital, University of Toronto, Toronto; Ottawa Hospital Research Institute, School of Epidemiology, Public Health and Preventative Medicine, University of Ottawa, Ottawa, Ontario, Canada; Sorbonne Universités, UPMC Univ Paris 06, Institut Pierre Louis d'Epidémiologie et de Santé Publique, GRC-UPMC 08 (EEMOIS); AP-HP, Pitié Salpêtrière Hospital, Department of Rheumatology, Paris, France; The Parker Institute, Bispebjerg and Frederiksberg Hospital, Frederiksberg, Denmark; Department of Rheumatology and Immunology, Singapore General Hospital, Singapore; Department of Internal Medicine, Division of Rheumatology, Hacettepe University, Ankara, Turkey.|A.M. Orbai, MD, MHS, Division of Rheumatology, Johns Hopkins University School of Medicine; M. de Wit, PhD, Patient Research Partner, VU Medical Centre; P.J. Mease, MD, Rheumatology Research, Swedish Medical Center, and University of Washington School of Medicine; K. Callis Duffin, MD, Department of Dermatology, University of Utah; M. Elmamoun, MBBS, MRCPI, Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin; W. Tillett, BSc, MB ChB, PhD, MRCP, Royal National Hospital for Rheumatic Diseases; W. Campbell, BEd LLB, Patient Research Partner, Toronto Western Hospital; O. FitzGerald, MD, FRCPI, FRCP(UK), Newman Clinical Research Professor, Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin; D.D. Gladman, MD, FRCPC, Professor of Medicine, University of Toronto, and Senior Scientist, Krembil Research Institute, and Director, Psoriatic Arthritis Program, University Health Network; N. Goel, MD, Patient Research Partner, Quintiles, Duke University School of Medicine; L. Gossec, MD, PhD, Sorbonne Universités, UPMC Univ Paris 06, Institut Pierre Louis d'Epidémiologie et de Santé Publique, GRC-UPMC 08 (EEMOIS), and AP-HP, Pitié Salpêtrière Hospital, Department of Rheumatology; P. Hoejgaard, MD, The Parker Institute, Bispebjerg and Frederiksberg Hospital; Y.Y. Leung, MD, PhD, Department of Rheumatology and Immunology, Singapore General Hospital; C.A. Lindsay, PharmD, Patient Research Partner; V. Strand, MD, Division of Immunology, Stanford University; D.M. van der Heijde, MD, PhD, Department of Rheumatology, Leiden University Medical Center; B. Shea, MSc, PhD, Senior Methodologist, Ottawa Hospital Research Institute, Adjunct Professor, School of Epidemiology, Public Health and Preventative Medicine, Faculty of Medicine, University of Ottawa; R. Christensen, BSc, MSc, PhD, Head of Unit, Professor of Clinical Epidemiology, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; L. Coates, MB ChB, PhD, Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, and Leeds Musculoskeletal Biomedical Research Unit, Leeds Teaching Hospitals NHS Trust; L. Eder, MD, PhD, Women's College Research Institute, Women's College Hospital, University of Toronto; N. McHugh, MBChB, MD, FRCP, FRCPath, Royal National Hospital for Rheumatic Diseases; U. Kalyoncu, MD, Department of Internal Medicine, Division of Rheumatology, Hacettepe University; I. Steinkoenig, BA, Patient Research Partner, Cleveland Clinic; A. Ogdie, MD, MSCE, University of Pennsylvania.
Pil
P
Hoejgaard
From the Division of Rheumatology, Johns Hopkins University School of Medicine, Baltimore, Maryland; Rheumatology Research, Swedish Medical Center and University of Washington School of Medicine, Seattle, Washington; Department of Dermatology, University of Utah, Salt Lake City, Utah; Quintiles, Duke University School of Medicine, Durham, North Carolina; Division of Immunology, Stanford University, Palo Alto, California; Cleveland Clinic, Cleveland, Ohio; University of Pennsylvania, Philadelphia, Pennsylvania, USA; VU Medical Centre, Amsterdam; Department of Rheumatology, Leiden University Medical Center, Leiden, the Netherlands; Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin, Dublin, Ireland; Royal National Hospital for Rheumatic Diseases; Royal National Hospital for Rheumatic Diseases, Bath; Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds; Leeds Musculoskeletal Biomedical Research Unit, Leeds Teaching Hospitals UK National Health Service (NHS) Trust, Leeds, UK; Toronto Western Hospital; University of Toronto; Krembil Research Institute; Psoriatic Arthritis Program, University Health Network; Women's College Research Institute, Women's College Hospital, University of Toronto, Toronto; Ottawa Hospital Research Institute, School of Epidemiology, Public Health and Preventative Medicine, University of Ottawa, Ottawa, Ontario, Canada; Sorbonne Universités, UPMC Univ Paris 06, Institut Pierre Louis d'Epidémiologie et de Santé Publique, GRC-UPMC 08 (EEMOIS); AP-HP, Pitié Salpêtrière Hospital, Department of Rheumatology, Paris, France; The Parker Institute, Bispebjerg and Frederiksberg Hospital, Frederiksberg, Denmark; Department of Rheumatology and Immunology, Singapore General Hospital, Singapore; Department of Internal Medicine, Division of Rheumatology, Hacettepe University, Ankara, Turkey.|A.M. Orbai, MD, MHS, Division of Rheumatology, Johns Hopkins University School of Medicine; M. de Wit, PhD, Patient Research Partner, VU Medical Centre; P.J. Mease, MD, Rheumatology Research, Swedish Medical Center, and University of Washington School of Medicine; K. Callis Duffin, MD, Department of Dermatology, University of Utah; M. Elmamoun, MBBS, MRCPI, Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin; W. Tillett, BSc, MB ChB, PhD, MRCP, Royal National Hospital for Rheumatic Diseases; W. Campbell, BEd LLB, Patient Research Partner, Toronto Western Hospital; O. FitzGerald, MD, FRCPI, FRCP(UK), Newman Clinical Research Professor, Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin; D.D. Gladman, MD, FRCPC, Professor of Medicine, University of Toronto, and Senior Scientist, Krembil Research Institute, and Director, Psoriatic Arthritis Program, University Health Network; N. Goel, MD, Patient Research Partner, Quintiles, Duke University School of Medicine; L. Gossec, MD, PhD, Sorbonne Universités, UPMC Univ Paris 06, Institut Pierre Louis d'Epidémiologie et de Santé Publique, GRC-UPMC 08 (EEMOIS), and AP-HP, Pitié Salpêtrière Hospital, Department of Rheumatology; P. Hoejgaard, MD, The Parker Institute, Bispebjerg and Frederiksberg Hospital; Y.Y. Leung, MD, PhD, Department of Rheumatology and Immunology, Singapore General Hospital; C.A. Lindsay, PharmD, Patient Research Partner; V. Strand, MD, Division of Immunology, Stanford University; D.M. van der Heijde, MD, PhD, Department of Rheumatology, Leiden University Medical Center; B. Shea, MSc, PhD, Senior Methodologist, Ottawa Hospital Research Institute, Adjunct Professor, School of Epidemiology, Public Health and Preventative Medicine, Faculty of Medicine, University of Ottawa; R. Christensen, BSc, MSc, PhD, Head of Unit, Professor of Clinical Epidemiology, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; L. Coates, MB ChB, PhD, Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, and Leeds Musculoskeletal Biomedical Research Unit, Leeds Teaching Hospitals NHS Trust; L. Eder, MD, PhD, Women's College Research Institute, Women's College Hospital, University of Toronto; N. McHugh, MBChB, MD, FRCP, FRCPath, Royal National Hospital for Rheumatic Diseases; U. Kalyoncu, MD, Department of Internal Medicine, Division of Rheumatology, Hacettepe University; I. Steinkoenig, BA, Patient Research Partner, Cleveland Clinic; A. Ogdie, MD, MSCE, University of Pennsylvania.
Ying Ying
YY
Leung
From the Division of Rheumatology, Johns Hopkins University School of Medicine, Baltimore, Maryland; Rheumatology Research, Swedish Medical Center and University of Washington School of Medicine, Seattle, Washington; Department of Dermatology, University of Utah, Salt Lake City, Utah; Quintiles, Duke University School of Medicine, Durham, North Carolina; Division of Immunology, Stanford University, Palo Alto, California; Cleveland Clinic, Cleveland, Ohio; University of Pennsylvania, Philadelphia, Pennsylvania, USA; VU Medical Centre, Amsterdam; Department of Rheumatology, Leiden University Medical Center, Leiden, the Netherlands; Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin, Dublin, Ireland; Royal National Hospital for Rheumatic Diseases; Royal National Hospital for Rheumatic Diseases, Bath; Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds; Leeds Musculoskeletal Biomedical Research Unit, Leeds Teaching Hospitals UK National Health Service (NHS) Trust, Leeds, UK; Toronto Western Hospital; University of Toronto; Krembil Research Institute; Psoriatic Arthritis Program, University Health Network; Women's College Research Institute, Women's College Hospital, University of Toronto, Toronto; Ottawa Hospital Research Institute, School of Epidemiology, Public Health and Preventative Medicine, University of Ottawa, Ottawa, Ontario, Canada; Sorbonne Universités, UPMC Univ Paris 06, Institut Pierre Louis d'Epidémiologie et de Santé Publique, GRC-UPMC 08 (EEMOIS); AP-HP, Pitié Salpêtrière Hospital, Department of Rheumatology, Paris, France; The Parker Institute, Bispebjerg and Frederiksberg Hospital, Frederiksberg, Denmark; Department of Rheumatology and Immunology, Singapore General Hospital, Singapore; Department of Internal Medicine, Division of Rheumatology, Hacettepe University, Ankara, Turkey.|A.M. Orbai, MD, MHS, Division of Rheumatology, Johns Hopkins University School of Medicine; M. de Wit, PhD, Patient Research Partner, VU Medical Centre; P.J. Mease, MD, Rheumatology Research, Swedish Medical Center, and University of Washington School of Medicine; K. Callis Duffin, MD, Department of Dermatology, University of Utah; M. Elmamoun, MBBS, MRCPI, Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin; W. Tillett, BSc, MB ChB, PhD, MRCP, Royal National Hospital for Rheumatic Diseases; W. Campbell, BEd LLB, Patient Research Partner, Toronto Western Hospital; O. FitzGerald, MD, FRCPI, FRCP(UK), Newman Clinical Research Professor, Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin; D.D. Gladman, MD, FRCPC, Professor of Medicine, University of Toronto, and Senior Scientist, Krembil Research Institute, and Director, Psoriatic Arthritis Program, University Health Network; N. Goel, MD, Patient Research Partner, Quintiles, Duke University School of Medicine; L. Gossec, MD, PhD, Sorbonne Universités, UPMC Univ Paris 06, Institut Pierre Louis d'Epidémiologie et de Santé Publique, GRC-UPMC 08 (EEMOIS), and AP-HP, Pitié Salpêtrière Hospital, Department of Rheumatology; P. Hoejgaard, MD, The Parker Institute, Bispebjerg and Frederiksberg Hospital; Y.Y. Leung, MD, PhD, Department of Rheumatology and Immunology, Singapore General Hospital; C.A. Lindsay, PharmD, Patient Research Partner; V. Strand, MD, Division of Immunology, Stanford University; D.M. van der Heijde, MD, PhD, Department of Rheumatology, Leiden University Medical Center; B. Shea, MSc, PhD, Senior Methodologist, Ottawa Hospital Research Institute, Adjunct Professor, School of Epidemiology, Public Health and Preventative Medicine, Faculty of Medicine, University of Ottawa; R. Christensen, BSc, MSc, PhD, Head of Unit, Professor of Clinical Epidemiology, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; L. Coates, MB ChB, PhD, Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, and Leeds Musculoskeletal Biomedical Research Unit, Leeds Teaching Hospitals NHS Trust; L. Eder, MD, PhD, Women's College Research Institute, Women's College Hospital, University of Toronto; N. McHugh, MBChB, MD, FRCP, FRCPath, Royal National Hospital for Rheumatic Diseases; U. Kalyoncu, MD, Department of Internal Medicine, Division of Rheumatology, Hacettepe University; I. Steinkoenig, BA, Patient Research Partner, Cleveland Clinic; A. Ogdie, MD, MSCE, University of Pennsylvania.
Chris
C
Lindsay
From the Division of Rheumatology, Johns Hopkins University School of Medicine, Baltimore, Maryland; Rheumatology Research, Swedish Medical Center and University of Washington School of Medicine, Seattle, Washington; Department of Dermatology, University of Utah, Salt Lake City, Utah; Quintiles, Duke University School of Medicine, Durham, North Carolina; Division of Immunology, Stanford University, Palo Alto, California; Cleveland Clinic, Cleveland, Ohio; University of Pennsylvania, Philadelphia, Pennsylvania, USA; VU Medical Centre, Amsterdam; Department of Rheumatology, Leiden University Medical Center, Leiden, the Netherlands; Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin, Dublin, Ireland; Royal National Hospital for Rheumatic Diseases; Royal National Hospital for Rheumatic Diseases, Bath; Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds; Leeds Musculoskeletal Biomedical Research Unit, Leeds Teaching Hospitals UK National Health Service (NHS) Trust, Leeds, UK; Toronto Western Hospital; University of Toronto; Krembil Research Institute; Psoriatic Arthritis Program, University Health Network; Women's College Research Institute, Women's College Hospital, University of Toronto, Toronto; Ottawa Hospital Research Institute, School of Epidemiology, Public Health and Preventative Medicine, University of Ottawa, Ottawa, Ontario, Canada; Sorbonne Universités, UPMC Univ Paris 06, Institut Pierre Louis d'Epidémiologie et de Santé Publique, GRC-UPMC 08 (EEMOIS); AP-HP, Pitié Salpêtrière Hospital, Department of Rheumatology, Paris, France; The Parker Institute, Bispebjerg and Frederiksberg Hospital, Frederiksberg, Denmark; Department of Rheumatology and Immunology, Singapore General Hospital, Singapore; Department of Internal Medicine, Division of Rheumatology, Hacettepe University, Ankara, Turkey.|A.M. Orbai, MD, MHS, Division of Rheumatology, Johns Hopkins University School of Medicine; M. de Wit, PhD, Patient Research Partner, VU Medical Centre; P.J. Mease, MD, Rheumatology Research, Swedish Medical Center, and University of Washington School of Medicine; K. Callis Duffin, MD, Department of Dermatology, University of Utah; M. Elmamoun, MBBS, MRCPI, Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin; W. Tillett, BSc, MB ChB, PhD, MRCP, Royal National Hospital for Rheumatic Diseases; W. Campbell, BEd LLB, Patient Research Partner, Toronto Western Hospital; O. FitzGerald, MD, FRCPI, FRCP(UK), Newman Clinical Research Professor, Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin; D.D. Gladman, MD, FRCPC, Professor of Medicine, University of Toronto, and Senior Scientist, Krembil Research Institute, and Director, Psoriatic Arthritis Program, University Health Network; N. Goel, MD, Patient Research Partner, Quintiles, Duke University School of Medicine; L. Gossec, MD, PhD, Sorbonne Universités, UPMC Univ Paris 06, Institut Pierre Louis d'Epidémiologie et de Santé Publique, GRC-UPMC 08 (EEMOIS), and AP-HP, Pitié Salpêtrière Hospital, Department of Rheumatology; P. Hoejgaard, MD, The Parker Institute, Bispebjerg and Frederiksberg Hospital; Y.Y. Leung, MD, PhD, Department of Rheumatology and Immunology, Singapore General Hospital; C.A. Lindsay, PharmD, Patient Research Partner; V. Strand, MD, Division of Immunology, Stanford University; D.M. van der Heijde, MD, PhD, Department of Rheumatology, Leiden University Medical Center; B. Shea, MSc, PhD, Senior Methodologist, Ottawa Hospital Research Institute, Adjunct Professor, School of Epidemiology, Public Health and Preventative Medicine, Faculty of Medicine, University of Ottawa; R. Christensen, BSc, MSc, PhD, Head of Unit, Professor of Clinical Epidemiology, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; L. Coates, MB ChB, PhD, Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, and Leeds Musculoskeletal Biomedical Research Unit, Leeds Teaching Hospitals NHS Trust; L. Eder, MD, PhD, Women's College Research Institute, Women's College Hospital, University of Toronto; N. McHugh, MBChB, MD, FRCP, FRCPath, Royal National Hospital for Rheumatic Diseases; U. Kalyoncu, MD, Department of Internal Medicine, Division of Rheumatology, Hacettepe University; I. Steinkoenig, BA, Patient Research Partner, Cleveland Clinic; A. Ogdie, MD, MSCE, University of Pennsylvania.
Vibeke
V
Strand
From the Division of Rheumatology, Johns Hopkins University School of Medicine, Baltimore, Maryland; Rheumatology Research, Swedish Medical Center and University of Washington School of Medicine, Seattle, Washington; Department of Dermatology, University of Utah, Salt Lake City, Utah; Quintiles, Duke University School of Medicine, Durham, North Carolina; Division of Immunology, Stanford University, Palo Alto, California; Cleveland Clinic, Cleveland, Ohio; University of Pennsylvania, Philadelphia, Pennsylvania, USA; VU Medical Centre, Amsterdam; Department of Rheumatology, Leiden University Medical Center, Leiden, the Netherlands; Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin, Dublin, Ireland; Royal National Hospital for Rheumatic Diseases; Royal National Hospital for Rheumatic Diseases, Bath; Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds; Leeds Musculoskeletal Biomedical Research Unit, Leeds Teaching Hospitals UK National Health Service (NHS) Trust, Leeds, UK; Toronto Western Hospital; University of Toronto; Krembil Research Institute; Psoriatic Arthritis Program, University Health Network; Women's College Research Institute, Women's College Hospital, University of Toronto, Toronto; Ottawa Hospital Research Institute, School of Epidemiology, Public Health and Preventative Medicine, University of Ottawa, Ottawa, Ontario, Canada; Sorbonne Universités, UPMC Univ Paris 06, Institut Pierre Louis d'Epidémiologie et de Santé Publique, GRC-UPMC 08 (EEMOIS); AP-HP, Pitié Salpêtrière Hospital, Department of Rheumatology, Paris, France; The Parker Institute, Bispebjerg and Frederiksberg Hospital, Frederiksberg, Denmark; Department of Rheumatology and Immunology, Singapore General Hospital, Singapore; Department of Internal Medicine, Division of Rheumatology, Hacettepe University, Ankara, Turkey.|A.M. Orbai, MD, MHS, Division of Rheumatology, Johns Hopkins University School of Medicine; M. de Wit, PhD, Patient Research Partner, VU Medical Centre; P.J. Mease, MD, Rheumatology Research, Swedish Medical Center, and University of Washington School of Medicine; K. Callis Duffin, MD, Department of Dermatology, University of Utah; M. Elmamoun, MBBS, MRCPI, Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin; W. Tillett, BSc, MB ChB, PhD, MRCP, Royal National Hospital for Rheumatic Diseases; W. Campbell, BEd LLB, Patient Research Partner, Toronto Western Hospital; O. FitzGerald, MD, FRCPI, FRCP(UK), Newman Clinical Research Professor, Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin; D.D. Gladman, MD, FRCPC, Professor of Medicine, University of Toronto, and Senior Scientist, Krembil Research Institute, and Director, Psoriatic Arthritis Program, University Health Network; N. Goel, MD, Patient Research Partner, Quintiles, Duke University School of Medicine; L. Gossec, MD, PhD, Sorbonne Universités, UPMC Univ Paris 06, Institut Pierre Louis d'Epidémiologie et de Santé Publique, GRC-UPMC 08 (EEMOIS), and AP-HP, Pitié Salpêtrière Hospital, Department of Rheumatology; P. Hoejgaard, MD, The Parker Institute, Bispebjerg and Frederiksberg Hospital; Y.Y. Leung, MD, PhD, Department of Rheumatology and Immunology, Singapore General Hospital; C.A. Lindsay, PharmD, Patient Research Partner; V. Strand, MD, Division of Immunology, Stanford University; D.M. van der Heijde, MD, PhD, Department of Rheumatology, Leiden University Medical Center; B. Shea, MSc, PhD, Senior Methodologist, Ottawa Hospital Research Institute, Adjunct Professor, School of Epidemiology, Public Health and Preventative Medicine, Faculty of Medicine, University of Ottawa; R. Christensen, BSc, MSc, PhD, Head of Unit, Professor of Clinical Epidemiology, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; L. Coates, MB ChB, PhD, Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, and Leeds Musculoskeletal Biomedical Research Unit, Leeds Teaching Hospitals NHS Trust; L. Eder, MD, PhD, Women's College Research Institute, Women's College Hospital, University of Toronto; N. McHugh, MBChB, MD, FRCP, FRCPath, Royal National Hospital for Rheumatic Diseases; U. Kalyoncu, MD, Department of Internal Medicine, Division of Rheumatology, Hacettepe University; I. Steinkoenig, BA, Patient Research Partner, Cleveland Clinic; A. Ogdie, MD, MSCE, University of Pennsylvania.
Désirée M
DM
van der Heijde
From the Division of Rheumatology, Johns Hopkins University School of Medicine, Baltimore, Maryland; Rheumatology Research, Swedish Medical Center and University of Washington School of Medicine, Seattle, Washington; Department of Dermatology, University of Utah, Salt Lake City, Utah; Quintiles, Duke University School of Medicine, Durham, North Carolina; Division of Immunology, Stanford University, Palo Alto, California; Cleveland Clinic, Cleveland, Ohio; University of Pennsylvania, Philadelphia, Pennsylvania, USA; VU Medical Centre, Amsterdam; Department of Rheumatology, Leiden University Medical Center, Leiden, the Netherlands; Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin, Dublin, Ireland; Royal National Hospital for Rheumatic Diseases; Royal National Hospital for Rheumatic Diseases, Bath; Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds; Leeds Musculoskeletal Biomedical Research Unit, Leeds Teaching Hospitals UK National Health Service (NHS) Trust, Leeds, UK; Toronto Western Hospital; University of Toronto; Krembil Research Institute; Psoriatic Arthritis Program, University Health Network; Women's College Research Institute, Women's College Hospital, University of Toronto, Toronto; Ottawa Hospital Research Institute, School of Epidemiology, Public Health and Preventative Medicine, University of Ottawa, Ottawa, Ontario, Canada; Sorbonne Universités, UPMC Univ Paris 06, Institut Pierre Louis d'Epidémiologie et de Santé Publique, GRC-UPMC 08 (EEMOIS); AP-HP, Pitié Salpêtrière Hospital, Department of Rheumatology, Paris, France; The Parker Institute, Bispebjerg and Frederiksberg Hospital, Frederiksberg, Denmark; Department of Rheumatology and Immunology, Singapore General Hospital, Singapore; Department of Internal Medicine, Division of Rheumatology, Hacettepe University, Ankara, Turkey.|A.M. Orbai, MD, MHS, Division of Rheumatology, Johns Hopkins University School of Medicine; M. de Wit, PhD, Patient Research Partner, VU Medical Centre; P.J. Mease, MD, Rheumatology Research, Swedish Medical Center, and University of Washington School of Medicine; K. Callis Duffin, MD, Department of Dermatology, University of Utah; M. Elmamoun, MBBS, MRCPI, Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin; W. Tillett, BSc, MB ChB, PhD, MRCP, Royal National Hospital for Rheumatic Diseases; W. Campbell, BEd LLB, Patient Research Partner, Toronto Western Hospital; O. FitzGerald, MD, FRCPI, FRCP(UK), Newman Clinical Research Professor, Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin; D.D. Gladman, MD, FRCPC, Professor of Medicine, University of Toronto, and Senior Scientist, Krembil Research Institute, and Director, Psoriatic Arthritis Program, University Health Network; N. Goel, MD, Patient Research Partner, Quintiles, Duke University School of Medicine; L. Gossec, MD, PhD, Sorbonne Universités, UPMC Univ Paris 06, Institut Pierre Louis d'Epidémiologie et de Santé Publique, GRC-UPMC 08 (EEMOIS), and AP-HP, Pitié Salpêtrière Hospital, Department of Rheumatology; P. Hoejgaard, MD, The Parker Institute, Bispebjerg and Frederiksberg Hospital; Y.Y. Leung, MD, PhD, Department of Rheumatology and Immunology, Singapore General Hospital; C.A. Lindsay, PharmD, Patient Research Partner; V. Strand, MD, Division of Immunology, Stanford University; D.M. van der Heijde, MD, PhD, Department of Rheumatology, Leiden University Medical Center; B. Shea, MSc, PhD, Senior Methodologist, Ottawa Hospital Research Institute, Adjunct Professor, School of Epidemiology, Public Health and Preventative Medicine, Faculty of Medicine, University of Ottawa; R. Christensen, BSc, MSc, PhD, Head of Unit, Professor of Clinical Epidemiology, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; L. Coates, MB ChB, PhD, Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, and Leeds Musculoskeletal Biomedical Research Unit, Leeds Teaching Hospitals NHS Trust; L. Eder, MD, PhD, Women's College Research Institute, Women's College Hospital, University of Toronto; N. McHugh, MBChB, MD, FRCP, FRCPath, Royal National Hospital for Rheumatic Diseases; U. Kalyoncu, MD, Department of Internal Medicine, Division of Rheumatology, Hacettepe University; I. Steinkoenig, BA, Patient Research Partner, Cleveland Clinic; A. Ogdie, MD, MSCE, University of Pennsylvania.
Bev
B
Shea
From the Division of Rheumatology, Johns Hopkins University School of Medicine, Baltimore, Maryland; Rheumatology Research, Swedish Medical Center and University of Washington School of Medicine, Seattle, Washington; Department of Dermatology, University of Utah, Salt Lake City, Utah; Quintiles, Duke University School of Medicine, Durham, North Carolina; Division of Immunology, Stanford University, Palo Alto, California; Cleveland Clinic, Cleveland, Ohio; University of Pennsylvania, Philadelphia, Pennsylvania, USA; VU Medical Centre, Amsterdam; Department of Rheumatology, Leiden University Medical Center, Leiden, the Netherlands; Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin, Dublin, Ireland; Royal National Hospital for Rheumatic Diseases; Royal National Hospital for Rheumatic Diseases, Bath; Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds; Leeds Musculoskeletal Biomedical Research Unit, Leeds Teaching Hospitals UK National Health Service (NHS) Trust, Leeds, UK; Toronto Western Hospital; University of Toronto; Krembil Research Institute; Psoriatic Arthritis Program, University Health Network; Women's College Research Institute, Women's College Hospital, University of Toronto, Toronto; Ottawa Hospital Research Institute, School of Epidemiology, Public Health and Preventative Medicine, University of Ottawa, Ottawa, Ontario, Canada; Sorbonne Universités, UPMC Univ Paris 06, Institut Pierre Louis d'Epidémiologie et de Santé Publique, GRC-UPMC 08 (EEMOIS); AP-HP, Pitié Salpêtrière Hospital, Department of Rheumatology, Paris, France; The Parker Institute, Bispebjerg and Frederiksberg Hospital, Frederiksberg, Denmark; Department of Rheumatology and Immunology, Singapore General Hospital, Singapore; Department of Internal Medicine, Division of Rheumatology, Hacettepe University, Ankara, Turkey.|A.M. Orbai, MD, MHS, Division of Rheumatology, Johns Hopkins University School of Medicine; M. de Wit, PhD, Patient Research Partner, VU Medical Centre; P.J. Mease, MD, Rheumatology Research, Swedish Medical Center, and University of Washington School of Medicine; K. Callis Duffin, MD, Department of Dermatology, University of Utah; M. Elmamoun, MBBS, MRCPI, Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin; W. Tillett, BSc, MB ChB, PhD, MRCP, Royal National Hospital for Rheumatic Diseases; W. Campbell, BEd LLB, Patient Research Partner, Toronto Western Hospital; O. FitzGerald, MD, FRCPI, FRCP(UK), Newman Clinical Research Professor, Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin; D.D. Gladman, MD, FRCPC, Professor of Medicine, University of Toronto, and Senior Scientist, Krembil Research Institute, and Director, Psoriatic Arthritis Program, University Health Network; N. Goel, MD, Patient Research Partner, Quintiles, Duke University School of Medicine; L. Gossec, MD, PhD, Sorbonne Universités, UPMC Univ Paris 06, Institut Pierre Louis d'Epidémiologie et de Santé Publique, GRC-UPMC 08 (EEMOIS), and AP-HP, Pitié Salpêtrière Hospital, Department of Rheumatology; P. Hoejgaard, MD, The Parker Institute, Bispebjerg and Frederiksberg Hospital; Y.Y. Leung, MD, PhD, Department of Rheumatology and Immunology, Singapore General Hospital; C.A. Lindsay, PharmD, Patient Research Partner; V. Strand, MD, Division of Immunology, Stanford University; D.M. van der Heijde, MD, PhD, Department of Rheumatology, Leiden University Medical Center; B. Shea, MSc, PhD, Senior Methodologist, Ottawa Hospital Research Institute, Adjunct Professor, School of Epidemiology, Public Health and Preventative Medicine, Faculty of Medicine, University of Ottawa; R. Christensen, BSc, MSc, PhD, Head of Unit, Professor of Clinical Epidemiology, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; L. Coates, MB ChB, PhD, Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, and Leeds Musculoskeletal Biomedical Research Unit, Leeds Teaching Hospitals NHS Trust; L. Eder, MD, PhD, Women's College Research Institute, Women's College Hospital, University of Toronto; N. McHugh, MBChB, MD, FRCP, FRCPath, Royal National Hospital for Rheumatic Diseases; U. Kalyoncu, MD, Department of Internal Medicine, Division of Rheumatology, Hacettepe University; I. Steinkoenig, BA, Patient Research Partner, Cleveland Clinic; A. Ogdie, MD, MSCE, University of Pennsylvania.
Robin
R
Christensen
From the Division of Rheumatology, Johns Hopkins University School of Medicine, Baltimore, Maryland; Rheumatology Research, Swedish Medical Center and University of Washington School of Medicine, Seattle, Washington; Department of Dermatology, University of Utah, Salt Lake City, Utah; Quintiles, Duke University School of Medicine, Durham, North Carolina; Division of Immunology, Stanford University, Palo Alto, California; Cleveland Clinic, Cleveland, Ohio; University of Pennsylvania, Philadelphia, Pennsylvania, USA; VU Medical Centre, Amsterdam; Department of Rheumatology, Leiden University Medical Center, Leiden, the Netherlands; Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin, Dublin, Ireland; Royal National Hospital for Rheumatic Diseases; Royal National Hospital for Rheumatic Diseases, Bath; Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds; Leeds Musculoskeletal Biomedical Research Unit, Leeds Teaching Hospitals UK National Health Service (NHS) Trust, Leeds, UK; Toronto Western Hospital; University of Toronto; Krembil Research Institute; Psoriatic Arthritis Program, University Health Network; Women's College Research Institute, Women's College Hospital, University of Toronto, Toronto; Ottawa Hospital Research Institute, School of Epidemiology, Public Health and Preventative Medicine, University of Ottawa, Ottawa, Ontario, Canada; Sorbonne Universités, UPMC Univ Paris 06, Institut Pierre Louis d'Epidémiologie et de Santé Publique, GRC-UPMC 08 (EEMOIS); AP-HP, Pitié Salpêtrière Hospital, Department of Rheumatology, Paris, France; The Parker Institute, Bispebjerg and Frederiksberg Hospital, Frederiksberg, Denmark; Department of Rheumatology and Immunology, Singapore General Hospital, Singapore; Department of Internal Medicine, Division of Rheumatology, Hacettepe University, Ankara, Turkey.|A.M. Orbai, MD, MHS, Division of Rheumatology, Johns Hopkins University School of Medicine; M. de Wit, PhD, Patient Research Partner, VU Medical Centre; P.J. Mease, MD, Rheumatology Research, Swedish Medical Center, and University of Washington School of Medicine; K. Callis Duffin, MD, Department of Dermatology, University of Utah; M. Elmamoun, MBBS, MRCPI, Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin; W. Tillett, BSc, MB ChB, PhD, MRCP, Royal National Hospital for Rheumatic Diseases; W. Campbell, BEd LLB, Patient Research Partner, Toronto Western Hospital; O. FitzGerald, MD, FRCPI, FRCP(UK), Newman Clinical Research Professor, Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin; D.D. Gladman, MD, FRCPC, Professor of Medicine, University of Toronto, and Senior Scientist, Krembil Research Institute, and Director, Psoriatic Arthritis Program, University Health Network; N. Goel, MD, Patient Research Partner, Quintiles, Duke University School of Medicine; L. Gossec, MD, PhD, Sorbonne Universités, UPMC Univ Paris 06, Institut Pierre Louis d'Epidémiologie et de Santé Publique, GRC-UPMC 08 (EEMOIS), and AP-HP, Pitié Salpêtrière Hospital, Department of Rheumatology; P. Hoejgaard, MD, The Parker Institute, Bispebjerg and Frederiksberg Hospital; Y.Y. Leung, MD, PhD, Department of Rheumatology and Immunology, Singapore General Hospital; C.A. Lindsay, PharmD, Patient Research Partner; V. Strand, MD, Division of Immunology, Stanford University; D.M. van der Heijde, MD, PhD, Department of Rheumatology, Leiden University Medical Center; B. Shea, MSc, PhD, Senior Methodologist, Ottawa Hospital Research Institute, Adjunct Professor, School of Epidemiology, Public Health and Preventative Medicine, Faculty of Medicine, University of Ottawa; R. Christensen, BSc, MSc, PhD, Head of Unit, Professor of Clinical Epidemiology, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; L. Coates, MB ChB, PhD, Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, and Leeds Musculoskeletal Biomedical Research Unit, Leeds Teaching Hospitals NHS Trust; L. Eder, MD, PhD, Women's College Research Institute, Women's College Hospital, University of Toronto; N. McHugh, MBChB, MD, FRCP, FRCPath, Royal National Hospital for Rheumatic Diseases; U. Kalyoncu, MD, Department of Internal Medicine, Division of Rheumatology, Hacettepe University; I. Steinkoenig, BA, Patient Research Partner, Cleveland Clinic; A. Ogdie, MD, MSCE, University of Pennsylvania.
Laura
L
Coates
From the Division of Rheumatology, Johns Hopkins University School of Medicine, Baltimore, Maryland; Rheumatology Research, Swedish Medical Center and University of Washington School of Medicine, Seattle, Washington; Department of Dermatology, University of Utah, Salt Lake City, Utah; Quintiles, Duke University School of Medicine, Durham, North Carolina; Division of Immunology, Stanford University, Palo Alto, California; Cleveland Clinic, Cleveland, Ohio; University of Pennsylvania, Philadelphia, Pennsylvania, USA; VU Medical Centre, Amsterdam; Department of Rheumatology, Leiden University Medical Center, Leiden, the Netherlands; Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin, Dublin, Ireland; Royal National Hospital for Rheumatic Diseases; Royal National Hospital for Rheumatic Diseases, Bath; Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds; Leeds Musculoskeletal Biomedical Research Unit, Leeds Teaching Hospitals UK National Health Service (NHS) Trust, Leeds, UK; Toronto Western Hospital; University of Toronto; Krembil Research Institute; Psoriatic Arthritis Program, University Health Network; Women's College Research Institute, Women's College Hospital, University of Toronto, Toronto; Ottawa Hospital Research Institute, School of Epidemiology, Public Health and Preventative Medicine, University of Ottawa, Ottawa, Ontario, Canada; Sorbonne Universités, UPMC Univ Paris 06, Institut Pierre Louis d'Epidémiologie et de Santé Publique, GRC-UPMC 08 (EEMOIS); AP-HP, Pitié Salpêtrière Hospital, Department of Rheumatology, Paris, France; The Parker Institute, Bispebjerg and Frederiksberg Hospital, Frederiksberg, Denmark; Department of Rheumatology and Immunology, Singapore General Hospital, Singapore; Department of Internal Medicine, Division of Rheumatology, Hacettepe University, Ankara, Turkey.|A.M. Orbai, MD, MHS, Division of Rheumatology, Johns Hopkins University School of Medicine; M. de Wit, PhD, Patient Research Partner, VU Medical Centre; P.J. Mease, MD, Rheumatology Research, Swedish Medical Center, and University of Washington School of Medicine; K. Callis Duffin, MD, Department of Dermatology, University of Utah; M. Elmamoun, MBBS, MRCPI, Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin; W. Tillett, BSc, MB ChB, PhD, MRCP, Royal National Hospital for Rheumatic Diseases; W. Campbell, BEd LLB, Patient Research Partner, Toronto Western Hospital; O. FitzGerald, MD, FRCPI, FRCP(UK), Newman Clinical Research Professor, Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin; D.D. Gladman, MD, FRCPC, Professor of Medicine, University of Toronto, and Senior Scientist, Krembil Research Institute, and Director, Psoriatic Arthritis Program, University Health Network; N. Goel, MD, Patient Research Partner, Quintiles, Duke University School of Medicine; L. Gossec, MD, PhD, Sorbonne Universités, UPMC Univ Paris 06, Institut Pierre Louis d'Epidémiologie et de Santé Publique, GRC-UPMC 08 (EEMOIS), and AP-HP, Pitié Salpêtrière Hospital, Department of Rheumatology; P. Hoejgaard, MD, The Parker Institute, Bispebjerg and Frederiksberg Hospital; Y.Y. Leung, MD, PhD, Department of Rheumatology and Immunology, Singapore General Hospital; C.A. Lindsay, PharmD, Patient Research Partner; V. Strand, MD, Division of Immunology, Stanford University; D.M. van der Heijde, MD, PhD, Department of Rheumatology, Leiden University Medical Center; B. Shea, MSc, PhD, Senior Methodologist, Ottawa Hospital Research Institute, Adjunct Professor, School of Epidemiology, Public Health and Preventative Medicine, Faculty of Medicine, University of Ottawa; R. Christensen, BSc, MSc, PhD, Head of Unit, Professor of Clinical Epidemiology, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; L. Coates, MB ChB, PhD, Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, and Leeds Musculoskeletal Biomedical Research Unit, Leeds Teaching Hospitals NHS Trust; L. Eder, MD, PhD, Women's College Research Institute, Women's College Hospital, University of Toronto; N. McHugh, MBChB, MD, FRCP, FRCPath, Royal National Hospital for Rheumatic Diseases; U. Kalyoncu, MD, Department of Internal Medicine, Division of Rheumatology, Hacettepe University; I. Steinkoenig, BA, Patient Research Partner, Cleveland Clinic; A. Ogdie, MD, MSCE, University of Pennsylvania.
Lihi
L
Eder
From the Division of Rheumatology, Johns Hopkins University School of Medicine, Baltimore, Maryland; Rheumatology Research, Swedish Medical Center and University of Washington School of Medicine, Seattle, Washington; Department of Dermatology, University of Utah, Salt Lake City, Utah; Quintiles, Duke University School of Medicine, Durham, North Carolina; Division of Immunology, Stanford University, Palo Alto, California; Cleveland Clinic, Cleveland, Ohio; University of Pennsylvania, Philadelphia, Pennsylvania, USA; VU Medical Centre, Amsterdam; Department of Rheumatology, Leiden University Medical Center, Leiden, the Netherlands; Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin, Dublin, Ireland; Royal National Hospital for Rheumatic Diseases; Royal National Hospital for Rheumatic Diseases, Bath; Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds; Leeds Musculoskeletal Biomedical Research Unit, Leeds Teaching Hospitals UK National Health Service (NHS) Trust, Leeds, UK; Toronto Western Hospital; University of Toronto; Krembil Research Institute; Psoriatic Arthritis Program, University Health Network; Women's College Research Institute, Women's College Hospital, University of Toronto, Toronto; Ottawa Hospital Research Institute, School of Epidemiology, Public Health and Preventative Medicine, University of Ottawa, Ottawa, Ontario, Canada; Sorbonne Universités, UPMC Univ Paris 06, Institut Pierre Louis d'Epidémiologie et de Santé Publique, GRC-UPMC 08 (EEMOIS); AP-HP, Pitié Salpêtrière Hospital, Department of Rheumatology, Paris, France; The Parker Institute, Bispebjerg and Frederiksberg Hospital, Frederiksberg, Denmark; Department of Rheumatology and Immunology, Singapore General Hospital, Singapore; Department of Internal Medicine, Division of Rheumatology, Hacettepe University, Ankara, Turkey.|A.M. Orbai, MD, MHS, Division of Rheumatology, Johns Hopkins University School of Medicine; M. de Wit, PhD, Patient Research Partner, VU Medical Centre; P.J. Mease, MD, Rheumatology Research, Swedish Medical Center, and University of Washington School of Medicine; K. Callis Duffin, MD, Department of Dermatology, University of Utah; M. Elmamoun, MBBS, MRCPI, Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin; W. Tillett, BSc, MB ChB, PhD, MRCP, Royal National Hospital for Rheumatic Diseases; W. Campbell, BEd LLB, Patient Research Partner, Toronto Western Hospital; O. FitzGerald, MD, FRCPI, FRCP(UK), Newman Clinical Research Professor, Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin; D.D. Gladman, MD, FRCPC, Professor of Medicine, University of Toronto, and Senior Scientist, Krembil Research Institute, and Director, Psoriatic Arthritis Program, University Health Network; N. Goel, MD, Patient Research Partner, Quintiles, Duke University School of Medicine; L. Gossec, MD, PhD, Sorbonne Universités, UPMC Univ Paris 06, Institut Pierre Louis d'Epidémiologie et de Santé Publique, GRC-UPMC 08 (EEMOIS), and AP-HP, Pitié Salpêtrière Hospital, Department of Rheumatology; P. Hoejgaard, MD, The Parker Institute, Bispebjerg and Frederiksberg Hospital; Y.Y. Leung, MD, PhD, Department of Rheumatology and Immunology, Singapore General Hospital; C.A. Lindsay, PharmD, Patient Research Partner; V. Strand, MD, Division of Immunology, Stanford University; D.M. van der Heijde, MD, PhD, Department of Rheumatology, Leiden University Medical Center; B. Shea, MSc, PhD, Senior Methodologist, Ottawa Hospital Research Institute, Adjunct Professor, School of Epidemiology, Public Health and Preventative Medicine, Faculty of Medicine, University of Ottawa; R. Christensen, BSc, MSc, PhD, Head of Unit, Professor of Clinical Epidemiology, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; L. Coates, MB ChB, PhD, Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, and Leeds Musculoskeletal Biomedical Research Unit, Leeds Teaching Hospitals NHS Trust; L. Eder, MD, PhD, Women's College Research Institute, Women's College Hospital, University of Toronto; N. McHugh, MBChB, MD, FRCP, FRCPath, Royal National Hospital for Rheumatic Diseases; U. Kalyoncu, MD, Department of Internal Medicine, Division of Rheumatology, Hacettepe University; I. Steinkoenig, BA, Patient Research Partner, Cleveland Clinic; A. Ogdie, MD, MSCE, University of Pennsylvania.
Neil
N
McHugh
From the Division of Rheumatology, Johns Hopkins University School of Medicine, Baltimore, Maryland; Rheumatology Research, Swedish Medical Center and University of Washington School of Medicine, Seattle, Washington; Department of Dermatology, University of Utah, Salt Lake City, Utah; Quintiles, Duke University School of Medicine, Durham, North Carolina; Division of Immunology, Stanford University, Palo Alto, California; Cleveland Clinic, Cleveland, Ohio; University of Pennsylvania, Philadelphia, Pennsylvania, USA; VU Medical Centre, Amsterdam; Department of Rheumatology, Leiden University Medical Center, Leiden, the Netherlands; Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin, Dublin, Ireland; Royal National Hospital for Rheumatic Diseases; Royal National Hospital for Rheumatic Diseases, Bath; Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds; Leeds Musculoskeletal Biomedical Research Unit, Leeds Teaching Hospitals UK National Health Service (NHS) Trust, Leeds, UK; Toronto Western Hospital; University of Toronto; Krembil Research Institute; Psoriatic Arthritis Program, University Health Network; Women's College Research Institute, Women's College Hospital, University of Toronto, Toronto; Ottawa Hospital Research Institute, School of Epidemiology, Public Health and Preventative Medicine, University of Ottawa, Ottawa, Ontario, Canada; Sorbonne Universités, UPMC Univ Paris 06, Institut Pierre Louis d'Epidémiologie et de Santé Publique, GRC-UPMC 08 (EEMOIS); AP-HP, Pitié Salpêtrière Hospital, Department of Rheumatology, Paris, France; The Parker Institute, Bispebjerg and Frederiksberg Hospital, Frederiksberg, Denmark; Department of Rheumatology and Immunology, Singapore General Hospital, Singapore; Department of Internal Medicine, Division of Rheumatology, Hacettepe University, Ankara, Turkey.|A.M. Orbai, MD, MHS, Division of Rheumatology, Johns Hopkins University School of Medicine; M. de Wit, PhD, Patient Research Partner, VU Medical Centre; P.J. Mease, MD, Rheumatology Research, Swedish Medical Center, and University of Washington School of Medicine; K. Callis Duffin, MD, Department of Dermatology, University of Utah; M. Elmamoun, MBBS, MRCPI, Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin; W. Tillett, BSc, MB ChB, PhD, MRCP, Royal National Hospital for Rheumatic Diseases; W. Campbell, BEd LLB, Patient Research Partner, Toronto Western Hospital; O. FitzGerald, MD, FRCPI, FRCP(UK), Newman Clinical Research Professor, Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin; D.D. Gladman, MD, FRCPC, Professor of Medicine, University of Toronto, and Senior Scientist, Krembil Research Institute, and Director, Psoriatic Arthritis Program, University Health Network; N. Goel, MD, Patient Research Partner, Quintiles, Duke University School of Medicine; L. Gossec, MD, PhD, Sorbonne Universités, UPMC Univ Paris 06, Institut Pierre Louis d'Epidémiologie et de Santé Publique, GRC-UPMC 08 (EEMOIS), and AP-HP, Pitié Salpêtrière Hospital, Department of Rheumatology; P. Hoejgaard, MD, The Parker Institute, Bispebjerg and Frederiksberg Hospital; Y.Y. Leung, MD, PhD, Department of Rheumatology and Immunology, Singapore General Hospital; C.A. Lindsay, PharmD, Patient Research Partner; V. Strand, MD, Division of Immunology, Stanford University; D.M. van der Heijde, MD, PhD, Department of Rheumatology, Leiden University Medical Center; B. Shea, MSc, PhD, Senior Methodologist, Ottawa Hospital Research Institute, Adjunct Professor, School of Epidemiology, Public Health and Preventative Medicine, Faculty of Medicine, University of Ottawa; R. Christensen, BSc, MSc, PhD, Head of Unit, Professor of Clinical Epidemiology, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; L. Coates, MB ChB, PhD, Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, and Leeds Musculoskeletal Biomedical Research Unit, Leeds Teaching Hospitals NHS Trust; L. Eder, MD, PhD, Women's College Research Institute, Women's College Hospital, University of Toronto; N. McHugh, MBChB, MD, FRCP, FRCPath, Royal National Hospital for Rheumatic Diseases; U. Kalyoncu, MD, Department of Internal Medicine, Division of Rheumatology, Hacettepe University; I. Steinkoenig, BA, Patient Research Partner, Cleveland Clinic; A. Ogdie, MD, MSCE, University of Pennsylvania.
Umut
U
Kalyoncu
From the Division of Rheumatology, Johns Hopkins University School of Medicine, Baltimore, Maryland; Rheumatology Research, Swedish Medical Center and University of Washington School of Medicine, Seattle, Washington; Department of Dermatology, University of Utah, Salt Lake City, Utah; Quintiles, Duke University School of Medicine, Durham, North Carolina; Division of Immunology, Stanford University, Palo Alto, California; Cleveland Clinic, Cleveland, Ohio; University of Pennsylvania, Philadelphia, Pennsylvania, USA; VU Medical Centre, Amsterdam; Department of Rheumatology, Leiden University Medical Center, Leiden, the Netherlands; Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin, Dublin, Ireland; Royal National Hospital for Rheumatic Diseases; Royal National Hospital for Rheumatic Diseases, Bath; Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds; Leeds Musculoskeletal Biomedical Research Unit, Leeds Teaching Hospitals UK National Health Service (NHS) Trust, Leeds, UK; Toronto Western Hospital; University of Toronto; Krembil Research Institute; Psoriatic Arthritis Program, University Health Network; Women's College Research Institute, Women's College Hospital, University of Toronto, Toronto; Ottawa Hospital Research Institute, School of Epidemiology, Public Health and Preventative Medicine, University of Ottawa, Ottawa, Ontario, Canada; Sorbonne Universités, UPMC Univ Paris 06, Institut Pierre Louis d'Epidémiologie et de Santé Publique, GRC-UPMC 08 (EEMOIS); AP-HP, Pitié Salpêtrière Hospital, Department of Rheumatology, Paris, France; The Parker Institute, Bispebjerg and Frederiksberg Hospital, Frederiksberg, Denmark; Department of Rheumatology and Immunology, Singapore General Hospital, Singapore; Department of Internal Medicine, Division of Rheumatology, Hacettepe University, Ankara, Turkey.|A.M. Orbai, MD, MHS, Division of Rheumatology, Johns Hopkins University School of Medicine; M. de Wit, PhD, Patient Research Partner, VU Medical Centre; P.J. Mease, MD, Rheumatology Research, Swedish Medical Center, and University of Washington School of Medicine; K. Callis Duffin, MD, Department of Dermatology, University of Utah; M. Elmamoun, MBBS, MRCPI, Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin; W. Tillett, BSc, MB ChB, PhD, MRCP, Royal National Hospital for Rheumatic Diseases; W. Campbell, BEd LLB, Patient Research Partner, Toronto Western Hospital; O. FitzGerald, MD, FRCPI, FRCP(UK), Newman Clinical Research Professor, Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin; D.D. Gladman, MD, FRCPC, Professor of Medicine, University of Toronto, and Senior Scientist, Krembil Research Institute, and Director, Psoriatic Arthritis Program, University Health Network; N. Goel, MD, Patient Research Partner, Quintiles, Duke University School of Medicine; L. Gossec, MD, PhD, Sorbonne Universités, UPMC Univ Paris 06, Institut Pierre Louis d'Epidémiologie et de Santé Publique, GRC-UPMC 08 (EEMOIS), and AP-HP, Pitié Salpêtrière Hospital, Department of Rheumatology; P. Hoejgaard, MD, The Parker Institute, Bispebjerg and Frederiksberg Hospital; Y.Y. Leung, MD, PhD, Department of Rheumatology and Immunology, Singapore General Hospital; C.A. Lindsay, PharmD, Patient Research Partner; V. Strand, MD, Division of Immunology, Stanford University; D.M. van der Heijde, MD, PhD, Department of Rheumatology, Leiden University Medical Center; B. Shea, MSc, PhD, Senior Methodologist, Ottawa Hospital Research Institute, Adjunct Professor, School of Epidemiology, Public Health and Preventative Medicine, Faculty of Medicine, University of Ottawa; R. Christensen, BSc, MSc, PhD, Head of Unit, Professor of Clinical Epidemiology, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; L. Coates, MB ChB, PhD, Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, and Leeds Musculoskeletal Biomedical Research Unit, Leeds Teaching Hospitals NHS Trust; L. Eder, MD, PhD, Women's College Research Institute, Women's College Hospital, University of Toronto; N. McHugh, MBChB, MD, FRCP, FRCPath, Royal National Hospital for Rheumatic Diseases; U. Kalyoncu, MD, Department of Internal Medicine, Division of Rheumatology, Hacettepe University; I. Steinkoenig, BA, Patient Research Partner, Cleveland Clinic; A. Ogdie, MD, MSCE, University of Pennsylvania.
Ingrid
I
Steinkoenig
From the Division of Rheumatology, Johns Hopkins University School of Medicine, Baltimore, Maryland; Rheumatology Research, Swedish Medical Center and University of Washington School of Medicine, Seattle, Washington; Department of Dermatology, University of Utah, Salt Lake City, Utah; Quintiles, Duke University School of Medicine, Durham, North Carolina; Division of Immunology, Stanford University, Palo Alto, California; Cleveland Clinic, Cleveland, Ohio; University of Pennsylvania, Philadelphia, Pennsylvania, USA; VU Medical Centre, Amsterdam; Department of Rheumatology, Leiden University Medical Center, Leiden, the Netherlands; Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin, Dublin, Ireland; Royal National Hospital for Rheumatic Diseases; Royal National Hospital for Rheumatic Diseases, Bath; Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds; Leeds Musculoskeletal Biomedical Research Unit, Leeds Teaching Hospitals UK National Health Service (NHS) Trust, Leeds, UK; Toronto Western Hospital; University of Toronto; Krembil Research Institute; Psoriatic Arthritis Program, University Health Network; Women's College Research Institute, Women's College Hospital, University of Toronto, Toronto; Ottawa Hospital Research Institute, School of Epidemiology, Public Health and Preventative Medicine, University of Ottawa, Ottawa, Ontario, Canada; Sorbonne Universités, UPMC Univ Paris 06, Institut Pierre Louis d'Epidémiologie et de Santé Publique, GRC-UPMC 08 (EEMOIS); AP-HP, Pitié Salpêtrière Hospital, Department of Rheumatology, Paris, France; The Parker Institute, Bispebjerg and Frederiksberg Hospital, Frederiksberg, Denmark; Department of Rheumatology and Immunology, Singapore General Hospital, Singapore; Department of Internal Medicine, Division of Rheumatology, Hacettepe University, Ankara, Turkey.|A.M. Orbai, MD, MHS, Division of Rheumatology, Johns Hopkins University School of Medicine; M. de Wit, PhD, Patient Research Partner, VU Medical Centre; P.J. Mease, MD, Rheumatology Research, Swedish Medical Center, and University of Washington School of Medicine; K. Callis Duffin, MD, Department of Dermatology, University of Utah; M. Elmamoun, MBBS, MRCPI, Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin; W. Tillett, BSc, MB ChB, PhD, MRCP, Royal National Hospital for Rheumatic Diseases; W. Campbell, BEd LLB, Patient Research Partner, Toronto Western Hospital; O. FitzGerald, MD, FRCPI, FRCP(UK), Newman Clinical Research Professor, Department of Rheumatology, St. Vincent's University Hospital, and Conway Institute for Biomolecular Research, University College Dublin; D.D. Gladman, MD, FRCPC, Professor of Medicine, University of Toronto, and Senior Scientist, Krembil Research Institute, and Director, Psoriatic Arthritis Program, University Health Network; N. Goel, MD, Patient Research Partner, Quintiles, Duke University School of Medicine; L. Gossec, MD, PhD, Sorbonne Universités, UPMC Univ Paris 06, Institut Pierre Louis d'Epidémiologie et de Santé Publique, GRC-UPMC 08 (EEMOIS), and AP-HP, Pitié Salpêtrière Hospital, Department of Rheumatology; P. Hoejgaard, MD, The Parker Institute, Bispebjerg and Frederiksberg Hospital; Y.Y. Leung, MD, PhD, Department of Rheumatology and Immunology, Singapore General Hospital; C.A. Lindsay, PharmD, Patient Research Partner; V. Strand, MD, Division of Immunology, Stanford University; D.M. van der Heijde, MD, PhD, Department of Rheumatology, Leiden University Medical Center; B. Shea, MSc, PhD, Senior Methodologist, Ottawa Hospital Research Institute, Adjunct Professor, School of Epidemiology, Public Health and Preventative Medicine, Faculty of Medicine, University of Ottawa; R. Christensen, BSc, MSc, PhD, Head of Unit, Professor of Clinical Epidemiology, Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital; L. Coates, MB ChB, PhD, Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, and Leeds Musculoskeletal Biomedical Research Unit, Leeds Teaching Hospitals NHS Trust; L. Eder, MD, PhD, Women's College Research Institute, Women's College Hospital, University of Toronto; N. McHugh, MBChB, MD, FRCP, FRCPath, Royal National Hospital for Rheumatic Diseases; U. Kalyoncu, MD, Department of Internal Medicine, Division of Rheumatology, Hacettepe University; I. Steinkoenig, BA, Patient Research Partner, Cleveland Clinic; A. Ogdie, MD, MSCE, University of Pennsylvania.
Alexis
A
Ogdie
D018501:Antirheumatic Agents / Q000627:therapeutic use*; D015535:Arthritis, Psoriatic / Q000175:diagnosis / Q000188:drug therapy*; D002986:Clinical Trials as Topic; D006801:Humans; D017063:Outcome Assessment, Health Care; D011788:Quality of Life; D012219:Rheumatology; D012720:Severity of Illness Index; D016896:Treatment Outcome
D018501:Antirheumatic Agents
CORE SET; OUTCOME MEASURES; PSORIATIC ARTHRITIS