title: Two-year Efficacy and Safety of Etanercept in Pediatric Patients with Extended Oligoarthritis, Enthesitis-related Arthritis, or Psoriatic Arthritis.
abstract: OBJECTIVE
  The main objective was to determine the 2-year clinical benefit and safety of etanercept (ETN) in children with the juvenile idiopathic arthritis (JIA) categories of extended oligoarthritis (eoJIA), enthesitis-related arthritis (ERA), or psoriatic arthritis (PsA).
  
  
  METHODS
  CLIPPER was a 96-week, phase IIIb, open-label, multicenter study. Patients with eoJIA, ERA, or PsA received ETN 0.8 mg/kg once weekly (50 mg max) for up to 96 weeks. The proportions of patients reaching the JIA American College of Rheumatology (ACR) 30/50/70/90/100 and inactive disease responses at Week 96 were calculated. Adverse events (AE) were collected throughout the study (intention-to-treat sample).
  
  
  RESULTS
  There were 127 patients (eoJIA n = 60, ERA n = 38, PsA n = 29) who received ≥ 1 dose of ETN. The mean disease duration was 31.6 (eoJIA), 23.0 (ERA), and 21.8 (PsA) months. At Week 96, JIA ACR 30/50/70/90/100/inactive disease responses (95% CI) were achieved by 84.3% (76.7, 90.1), 83.5% (75.8, 89.5), 78.7% (70.6, 85.5), 55.1% (46.0, 63.9), 45.7% (36.8, 54.7), and 27.6% (20.0, 36.2) of patients, respectively. The most common AE (no. events, events per 100 patient-yrs) overall were headache (23, 10.7), pyrexia (12, 5.6), and diarrhea (10, 4.6). The most common infections were upper respiratory tract infection (83, 38.6), pharyngitis (50, 23.2), gastroenteritis (22, 10.2), bronchitis (19, 8.8), and rhinitis (17, 7.9). No cases of malignancy, active tuberculosis, demyelinating disorders, or death were reported.
  
  
  CONCLUSIONS
  Over 96 weeks of therapy, ETN demonstrated sustained efficacy at treating the clinical symptoms of all 3 JIA categories, with no major safety issues.
authors.affiliation: From the Paediatric Rheumatology International Trials Organisation (PRINTO), Istituto G. Gaslini, Pediatria II-Reumatologia, PRINTO, Genoa, Italy.T. Constantin, MD, PhD, 2nd Department of Pediatrics, Semmelweis University, Budapest, Hungary; I. Foeldvari, MD, Hamburg Centre for Child and Adolescent Rheumatology, Hamburg, Germany; J. Vojinovic, MD, PhD, Clinic of Pediatrics, Clinical Centre, Faculty of Medicine, University of Nis, Serbia; G. Horneff, MD, Asklepios Clinic, Sankt Augustin, Germany; R. Burgos-Vargas, MD, Hospital General de Mexico, Mexico City, Mexico; I. Nikishina, MD, V.A. Nasonova Research Institute of Rheumatology, Moscow, Russia; J.D. Akikusa, MD, Royal Children's Hospital Melbourne, Parkville, Victoria, Australia; T. Avcin, MD, PhD, University Medical Centre Ljubljana, Pediatric Clinic, Ljubljana, Slovenia; J. Chaitow, MD, The Sydney Children's Hospital Network, Westmead, Sydney, Australia; E. Koskova, MD, PhD, National Institute of Rheumatic Diseases, Piestany, Slovakia; B.R. Lauwerys, MD, PhD, Institut de Recherche Expérimentale et Clinique, Université catholique de Louvain and Department of Rheumatology, Cliniques Universitaires Saint-Luc, Brussels, Belgium; I. Calvo Penades, MD, PhD, Hospital Universitario y Politécnico La Fe, Pediatric Rheumatology Unit, Valencia, Spain; B. Flato, MD, PhD, Oslo University Hospital, Department of Rheumatology, Oslo, Norway; M.L. Gamir, MD, Hospital Ramon y Cajal Unidad de Reumatologia Pediatrica, Madrid, Spain; H.I. Huppertz, MD, Klinikum Bremen-Mitte, Prof. Hess-Kinderklinik, Bremen, Germany; J.J. Raad, MD, Centro de Reumatologia y Ortopedia, Barranquilla, Atlantico, Colombia; K. Jarosova, MD, Revmatologicky Ustav, Prague, Czech Republic; J. Anton, MD, PhD, Pediatric Rheumatology Unit, Hospital Sant Joan de Déu, Universitat de Barcelona, Espluges (Barcelona), Spain; M. Macku, MD, Fakultni nemocnice Brno, Bohunice, Detska Nemocnice, Ambulance detske revmatologie detske kliniky, Brno, Czech Republic; W.J. O
authors.forename: Tamas
authors.initials: T
authors.lastname: Constantin
authors.affiliation: From the Paediatric Rheumatology International Trials Organisation (PRINTO), Istituto G. Gaslini, Pediatria II-Reumatologia, PRINTO, Genoa, Italy.T. Constantin, MD, PhD, 2nd Department of Pediatrics, Semmelweis University, Budapest, Hungary; I. Foeldvari, MD, Hamburg Centre for Child and Adolescent Rheumatology, Hamburg, Germany; J. Vojinovic, MD, PhD, Clinic of Pediatrics, Clinical Centre, Faculty of Medicine, University of Nis, Serbia; G. Horneff, MD, Asklepios Clinic, Sankt Augustin, Germany; R. Burgos-Vargas, MD, Hospital General de Mexico, Mexico City, Mexico; I. Nikishina, MD, V.A. Nasonova Research Institute of Rheumatology, Moscow, Russia; J.D. Akikusa, MD, Royal Children's Hospital Melbourne, Parkville, Victoria, Australia; T. Avcin, MD, PhD, University Medical Centre Ljubljana, Pediatric Clinic, Ljubljana, Slovenia; J. Chaitow, MD, The Sydney Children's Hospital Network, Westmead, Sydney, Australia; E. Koskova, MD, PhD, National Institute of Rheumatic Diseases, Piestany, Slovakia; B.R. Lauwerys, MD, PhD, Institut de Recherche Expérimentale et Clinique, Université catholique de Louvain and Department of Rheumatology, Cliniques Universitaires Saint-Luc, Brussels, Belgium; I. Calvo Penades, MD, PhD, Hospital Universitario y Politécnico La Fe, Pediatric Rheumatology Unit, Valencia, Spain; B. Flato, MD, PhD, Oslo University Hospital, Department of Rheumatology, Oslo, Norway; M.L. Gamir, MD, Hospital Ramon y Cajal Unidad de Reumatologia Pediatrica, Madrid, Spain; H.I. Huppertz, MD, Klinikum Bremen-Mitte, Prof. Hess-Kinderklinik, Bremen, Germany; J.J. Raad, MD, Centro de Reumatologia y Ortopedia, Barranquilla, Atlantico, Colombia; K. Jarosova, MD, Revmatologicky Ustav, Prague, Czech Republic; J. Anton, MD, PhD, Pediatric Rheumatology Unit, Hospital Sant Joan de Déu, Universitat de Barcelona, Espluges (Barcelona), Spain; M. Macku, MD, Fakultni nemocnice Brno, Bohunice, Detska Nemocnice, Ambulance detske revmatologie detske kliniky, Brno, Czech Republic; W.J. O
authors.forename: Ivan
authors.initials: I
authors.lastname: Foeldvari
authors.affiliation: From the Paediatric Rheumatology International Trials Organisation (PRINTO), Istituto G. Gaslini, Pediatria II-Reumatologia, PRINTO, Genoa, Italy.T. Constantin, MD, PhD, 2nd Department of Pediatrics, Semmelweis University, Budapest, Hungary; I. Foeldvari, MD, Hamburg Centre for Child and Adolescent Rheumatology, Hamburg, Germany; J. Vojinovic, MD, PhD, Clinic of Pediatrics, Clinical Centre, Faculty of Medicine, University of Nis, Serbia; G. Horneff, MD, Asklepios Clinic, Sankt Augustin, Germany; R. Burgos-Vargas, MD, Hospital General de Mexico, Mexico City, Mexico; I. Nikishina, MD, V.A. Nasonova Research Institute of Rheumatology, Moscow, Russia; J.D. Akikusa, MD, Royal Children's Hospital Melbourne, Parkville, Victoria, Australia; T. Avcin, MD, PhD, University Medical Centre Ljubljana, Pediatric Clinic, Ljubljana, Slovenia; J. Chaitow, MD, The Sydney Children's Hospital Network, Westmead, Sydney, Australia; E. Koskova, MD, PhD, National Institute of Rheumatic Diseases, Piestany, Slovakia; B.R. Lauwerys, MD, PhD, Institut de Recherche Expérimentale et Clinique, Université catholique de Louvain and Department of Rheumatology, Cliniques Universitaires Saint-Luc, Brussels, Belgium; I. Calvo Penades, MD, PhD, Hospital Universitario y Politécnico La Fe, Pediatric Rheumatology Unit, Valencia, Spain; B. Flato, MD, PhD, Oslo University Hospital, Department of Rheumatology, Oslo, Norway; M.L. Gamir, MD, Hospital Ramon y Cajal Unidad de Reumatologia Pediatrica, Madrid, Spain; H.I. Huppertz, MD, Klinikum Bremen-Mitte, Prof. Hess-Kinderklinik, Bremen, Germany; J.J. Raad, MD, Centro de Reumatologia y Ortopedia, Barranquilla, Atlantico, Colombia; K. Jarosova, MD, Revmatologicky Ustav, Prague, Czech Republic; J. Anton, MD, PhD, Pediatric Rheumatology Unit, Hospital Sant Joan de Déu, Universitat de Barcelona, Espluges (Barcelona), Spain; M. Macku, MD, Fakultni nemocnice Brno, Bohunice, Detska Nemocnice, Ambulance detske revmatologie detske kliniky, Brno, Czech Republic; W.J. O
authors.forename: Jelena
authors.initials: J
authors.lastname: Vojinovic
authors.affiliation: From the Paediatric Rheumatology International Trials Organisation (PRINTO), Istituto G. Gaslini, Pediatria II-Reumatologia, PRINTO, Genoa, Italy.T. Constantin, MD, PhD, 2nd Department of Pediatrics, Semmelweis University, Budapest, Hungary; I. Foeldvari, MD, Hamburg Centre for Child and Adolescent Rheumatology, Hamburg, Germany; J. Vojinovic, MD, PhD, Clinic of Pediatrics, Clinical Centre, Faculty of Medicine, University of Nis, Serbia; G. Horneff, MD, Asklepios Clinic, Sankt Augustin, Germany; R. Burgos-Vargas, MD, Hospital General de Mexico, Mexico City, Mexico; I. Nikishina, MD, V.A. Nasonova Research Institute of Rheumatology, Moscow, Russia; J.D. Akikusa, MD, Royal Children's Hospital Melbourne, Parkville, Victoria, Australia; T. Avcin, MD, PhD, University Medical Centre Ljubljana, Pediatric Clinic, Ljubljana, Slovenia; J. Chaitow, MD, The Sydney Children's Hospital Network, Westmead, Sydney, Australia; E. Koskova, MD, PhD, National Institute of Rheumatic Diseases, Piestany, Slovakia; B.R. Lauwerys, MD, PhD, Institut de Recherche Expérimentale et Clinique, Université catholique de Louvain and Department of Rheumatology, Cliniques Universitaires Saint-Luc, Brussels, Belgium; I. Calvo Penades, MD, PhD, Hospital Universitario y Politécnico La Fe, Pediatric Rheumatology Unit, Valencia, Spain; B. Flato, MD, PhD, Oslo University Hospital, Department of Rheumatology, Oslo, Norway; M.L. Gamir, MD, Hospital Ramon y Cajal Unidad de Reumatologia Pediatrica, Madrid, Spain; H.I. Huppertz, MD, Klinikum Bremen-Mitte, Prof. Hess-Kinderklinik, Bremen, Germany; J.J. Raad, MD, Centro de Reumatologia y Ortopedia, Barranquilla, Atlantico, Colombia; K. Jarosova, MD, Revmatologicky Ustav, Prague, Czech Republic; J. Anton, MD, PhD, Pediatric Rheumatology Unit, Hospital Sant Joan de Déu, Universitat de Barcelona, Espluges (Barcelona), Spain; M. Macku, MD, Fakultni nemocnice Brno, Bohunice, Detska Nemocnice, Ambulance detske revmatologie detske kliniky, Brno, Czech Republic; W.J. O
authors.forename: Gerd
authors.initials: G
authors.lastname: Horneff
authors.affiliation: From the Paediatric Rheumatology International Trials Organisation (PRINTO), Istituto G. Gaslini, Pediatria II-Reumatologia, PRINTO, Genoa, Italy.T. Constantin, MD, PhD, 2nd Department of Pediatrics, Semmelweis University, Budapest, Hungary; I. Foeldvari, MD, Hamburg Centre for Child and Adolescent Rheumatology, Hamburg, Germany; J. Vojinovic, MD, PhD, Clinic of Pediatrics, Clinical Centre, Faculty of Medicine, University of Nis, Serbia; G. Horneff, MD, Asklepios Clinic, Sankt Augustin, Germany; R. Burgos-Vargas, MD, Hospital General de Mexico, Mexico City, Mexico; I. Nikishina, MD, V.A. Nasonova Research Institute of Rheumatology, Moscow, Russia; J.D. Akikusa, MD, Royal Children's Hospital Melbourne, Parkville, Victoria, Australia; T. Avcin, MD, PhD, University Medical Centre Ljubljana, Pediatric Clinic, Ljubljana, Slovenia; J. Chaitow, MD, The Sydney Children's Hospital Network, Westmead, Sydney, Australia; E. Koskova, MD, PhD, National Institute of Rheumatic Diseases, Piestany, Slovakia; B.R. Lauwerys, MD, PhD, Institut de Recherche Expérimentale et Clinique, Université catholique de Louvain and Department of Rheumatology, Cliniques Universitaires Saint-Luc, Brussels, Belgium; I. Calvo Penades, MD, PhD, Hospital Universitario y Politécnico La Fe, Pediatric Rheumatology Unit, Valencia, Spain; B. Flato, MD, PhD, Oslo University Hospital, Department of Rheumatology, Oslo, Norway; M.L. Gamir, MD, Hospital Ramon y Cajal Unidad de Reumatologia Pediatrica, Madrid, Spain; H.I. Huppertz, MD, Klinikum Bremen-Mitte, Prof. Hess-Kinderklinik, Bremen, Germany; J.J. Raad, MD, Centro de Reumatologia y Ortopedia, Barranquilla, Atlantico, Colombia; K. Jarosova, MD, Revmatologicky Ustav, Prague, Czech Republic; J. Anton, MD, PhD, Pediatric Rheumatology Unit, Hospital Sant Joan de Déu, Universitat de Barcelona, Espluges (Barcelona), Spain; M. Macku, MD, Fakultni nemocnice Brno, Bohunice, Detska Nemocnice, Ambulance detske revmatologie detske kliniky, Brno, Czech Republic; W.J. O
authors.forename: Ruben
authors.initials: R
authors.lastname: Burgos-Vargas
authors.affiliation: From the Paediatric Rheumatology International Trials Organisation (PRINTO), Istituto G. Gaslini, Pediatria II-Reumatologia, PRINTO, Genoa, Italy.T. Constantin, MD, PhD, 2nd Department of Pediatrics, Semmelweis University, Budapest, Hungary; I. Foeldvari, MD, Hamburg Centre for Child and Adolescent Rheumatology, Hamburg, Germany; J. Vojinovic, MD, PhD, Clinic of Pediatrics, Clinical Centre, Faculty of Medicine, University of Nis, Serbia; G. Horneff, MD, Asklepios Clinic, Sankt Augustin, Germany; R. Burgos-Vargas, MD, Hospital General de Mexico, Mexico City, Mexico; I. Nikishina, MD, V.A. Nasonova Research Institute of Rheumatology, Moscow, Russia; J.D. Akikusa, MD, Royal Children's Hospital Melbourne, Parkville, Victoria, Australia; T. Avcin, MD, PhD, University Medical Centre Ljubljana, Pediatric Clinic, Ljubljana, Slovenia; J. Chaitow, MD, The Sydney Children's Hospital Network, Westmead, Sydney, Australia; E. Koskova, MD, PhD, National Institute of Rheumatic Diseases, Piestany, Slovakia; B.R. Lauwerys, MD, PhD, Institut de Recherche Expérimentale et Clinique, Université catholique de Louvain and Department of Rheumatology, Cliniques Universitaires Saint-Luc, Brussels, Belgium; I. Calvo Penades, MD, PhD, Hospital Universitario y Politécnico La Fe, Pediatric Rheumatology Unit, Valencia, Spain; B. Flato, MD, PhD, Oslo University Hospital, Department of Rheumatology, Oslo, Norway; M.L. Gamir, MD, Hospital Ramon y Cajal Unidad de Reumatologia Pediatrica, Madrid, Spain; H.I. Huppertz, MD, Klinikum Bremen-Mitte, Prof. Hess-Kinderklinik, Bremen, Germany; J.J. Raad, MD, Centro de Reumatologia y Ortopedia, Barranquilla, Atlantico, Colombia; K. Jarosova, MD, Revmatologicky Ustav, Prague, Czech Republic; J. Anton, MD, PhD, Pediatric Rheumatology Unit, Hospital Sant Joan de Déu, Universitat de Barcelona, Espluges (Barcelona), Spain; M. Macku, MD, Fakultni nemocnice Brno, Bohunice, Detska Nemocnice, Ambulance detske revmatologie detske kliniky, Brno, Czech Republic; W.J. O
authors.forename: Irina
authors.initials: I
authors.lastname: Nikishina
authors.affiliation: From the Paediatric Rheumatology International Trials Organisation (PRINTO), Istituto G. Gaslini, Pediatria II-Reumatologia, PRINTO, Genoa, Italy.T. Constantin, MD, PhD, 2nd Department of Pediatrics, Semmelweis University, Budapest, Hungary; I. Foeldvari, MD, Hamburg Centre for Child and Adolescent Rheumatology, Hamburg, Germany; J. Vojinovic, MD, PhD, Clinic of Pediatrics, Clinical Centre, Faculty of Medicine, University of Nis, Serbia; G. Horneff, MD, Asklepios Clinic, Sankt Augustin, Germany; R. Burgos-Vargas, MD, Hospital General de Mexico, Mexico City, Mexico; I. Nikishina, MD, V.A. Nasonova Research Institute of Rheumatology, Moscow, Russia; J.D. Akikusa, MD, Royal Children's Hospital Melbourne, Parkville, Victoria, Australia; T. Avcin, MD, PhD, University Medical Centre Ljubljana, Pediatric Clinic, Ljubljana, Slovenia; J. Chaitow, MD, The Sydney Children's Hospital Network, Westmead, Sydney, Australia; E. Koskova, MD, PhD, National Institute of Rheumatic Diseases, Piestany, Slovakia; B.R. Lauwerys, MD, PhD, Institut de Recherche Expérimentale et Clinique, Université catholique de Louvain and Department of Rheumatology, Cliniques Universitaires Saint-Luc, Brussels, Belgium; I. Calvo Penades, MD, PhD, Hospital Universitario y Politécnico La Fe, Pediatric Rheumatology Unit, Valencia, Spain; B. Flato, MD, PhD, Oslo University Hospital, Department of Rheumatology, Oslo, Norway; M.L. Gamir, MD, Hospital Ramon y Cajal Unidad de Reumatologia Pediatrica, Madrid, Spain; H.I. Huppertz, MD, Klinikum Bremen-Mitte, Prof. Hess-Kinderklinik, Bremen, Germany; J.J. Raad, MD, Centro de Reumatologia y Ortopedia, Barranquilla, Atlantico, Colombia; K. Jarosova, MD, Revmatologicky Ustav, Prague, Czech Republic; J. Anton, MD, PhD, Pediatric Rheumatology Unit, Hospital Sant Joan de Déu, Universitat de Barcelona, Espluges (Barcelona), Spain; M. Macku, MD, Fakultni nemocnice Brno, Bohunice, Detska Nemocnice, Ambulance detske revmatologie detske kliniky, Brno, Czech Republic; W.J. O
authors.forename: Jonathan D
authors.initials: JD
authors.lastname: Akikusa
authors.affiliation: From the Paediatric Rheumatology International Trials Organisation (PRINTO), Istituto G. Gaslini, Pediatria II-Reumatologia, PRINTO, Genoa, Italy.T. Constantin, MD, PhD, 2nd Department of Pediatrics, Semmelweis University, Budapest, Hungary; I. Foeldvari, MD, Hamburg Centre for Child and Adolescent Rheumatology, Hamburg, Germany; J. Vojinovic, MD, PhD, Clinic of Pediatrics, Clinical Centre, Faculty of Medicine, University of Nis, Serbia; G. Horneff, MD, Asklepios Clinic, Sankt Augustin, Germany; R. Burgos-Vargas, MD, Hospital General de Mexico, Mexico City, Mexico; I. Nikishina, MD, V.A. Nasonova Research Institute of Rheumatology, Moscow, Russia; J.D. Akikusa, MD, Royal Children's Hospital Melbourne, Parkville, Victoria, Australia; T. Avcin, MD, PhD, University Medical Centre Ljubljana, Pediatric Clinic, Ljubljana, Slovenia; J. Chaitow, MD, The Sydney Children's Hospital Network, Westmead, Sydney, Australia; E. Koskova, MD, PhD, National Institute of Rheumatic Diseases, Piestany, Slovakia; B.R. Lauwerys, MD, PhD, Institut de Recherche Expérimentale et Clinique, Université catholique de Louvain and Department of Rheumatology, Cliniques Universitaires Saint-Luc, Brussels, Belgium; I. Calvo Penades, MD, PhD, Hospital Universitario y Politécnico La Fe, Pediatric Rheumatology Unit, Valencia, Spain; B. Flato, MD, PhD, Oslo University Hospital, Department of Rheumatology, Oslo, Norway; M.L. Gamir, MD, Hospital Ramon y Cajal Unidad de Reumatologia Pediatrica, Madrid, Spain; H.I. Huppertz, MD, Klinikum Bremen-Mitte, Prof. Hess-Kinderklinik, Bremen, Germany; J.J. Raad, MD, Centro de Reumatologia y Ortopedia, Barranquilla, Atlantico, Colombia; K. Jarosova, MD, Revmatologicky Ustav, Prague, Czech Republic; J. Anton, MD, PhD, Pediatric Rheumatology Unit, Hospital Sant Joan de Déu, Universitat de Barcelona, Espluges (Barcelona), Spain; M. Macku, MD, Fakultni nemocnice Brno, Bohunice, Detska Nemocnice, Ambulance detske revmatologie detske kliniky, Brno, Czech Republic; W.J. O
authors.forename: Tadej
authors.initials: T
authors.lastname: Avcin
authors.affiliation: From the Paediatric Rheumatology International Trials Organisation (PRINTO), Istituto G. Gaslini, Pediatria II-Reumatologia, PRINTO, Genoa, Italy.T. Constantin, MD, PhD, 2nd Department of Pediatrics, Semmelweis University, Budapest, Hungary; I. Foeldvari, MD, Hamburg Centre for Child and Adolescent Rheumatology, Hamburg, Germany; J. Vojinovic, MD, PhD, Clinic of Pediatrics, Clinical Centre, Faculty of Medicine, University of Nis, Serbia; G. Horneff, MD, Asklepios Clinic, Sankt Augustin, Germany; R. Burgos-Vargas, MD, Hospital General de Mexico, Mexico City, Mexico; I. Nikishina, MD, V.A. Nasonova Research Institute of Rheumatology, Moscow, Russia; J.D. Akikusa, MD, Royal Children's Hospital Melbourne, Parkville, Victoria, Australia; T. Avcin, MD, PhD, University Medical Centre Ljubljana, Pediatric Clinic, Ljubljana, Slovenia; J. Chaitow, MD, The Sydney Children's Hospital Network, Westmead, Sydney, Australia; E. Koskova, MD, PhD, National Institute of Rheumatic Diseases, Piestany, Slovakia; B.R. Lauwerys, MD, PhD, Institut de Recherche Expérimentale et Clinique, Université catholique de Louvain and Department of Rheumatology, Cliniques Universitaires Saint-Luc, Brussels, Belgium; I. Calvo Penades, MD, PhD, Hospital Universitario y Politécnico La Fe, Pediatric Rheumatology Unit, Valencia, Spain; B. Flato, MD, PhD, Oslo University Hospital, Department of Rheumatology, Oslo, Norway; M.L. Gamir, MD, Hospital Ramon y Cajal Unidad de Reumatologia Pediatrica, Madrid, Spain; H.I. Huppertz, MD, Klinikum Bremen-Mitte, Prof. Hess-Kinderklinik, Bremen, Germany; J.J. Raad, MD, Centro de Reumatologia y Ortopedia, Barranquilla, Atlantico, Colombia; K. Jarosova, MD, Revmatologicky Ustav, Prague, Czech Republic; J. Anton, MD, PhD, Pediatric Rheumatology Unit, Hospital Sant Joan de Déu, Universitat de Barcelona, Espluges (Barcelona), Spain; M. Macku, MD, Fakultni nemocnice Brno, Bohunice, Detska Nemocnice, Ambulance detske revmatologie detske kliniky, Brno, Czech Republic; W.J. O
authors.forename: Jeffrey
authors.initials: J
authors.lastname: Chaitow
authors.affiliation: From the Paediatric Rheumatology International Trials Organisation (PRINTO), Istituto G. Gaslini, Pediatria II-Reumatologia, PRINTO, Genoa, Italy.T. Constantin, MD, PhD, 2nd Department of Pediatrics, Semmelweis University, Budapest, Hungary; I. Foeldvari, MD, Hamburg Centre for Child and Adolescent Rheumatology, Hamburg, Germany; J. Vojinovic, MD, PhD, Clinic of Pediatrics, Clinical Centre, Faculty of Medicine, University of Nis, Serbia; G. Horneff, MD, Asklepios Clinic, Sankt Augustin, Germany; R. Burgos-Vargas, MD, Hospital General de Mexico, Mexico City, Mexico; I. Nikishina, MD, V.A. Nasonova Research Institute of Rheumatology, Moscow, Russia; J.D. Akikusa, MD, Royal Children's Hospital Melbourne, Parkville, Victoria, Australia; T. Avcin, MD, PhD, University Medical Centre Ljubljana, Pediatric Clinic, Ljubljana, Slovenia; J. Chaitow, MD, The Sydney Children's Hospital Network, Westmead, Sydney, Australia; E. Koskova, MD, PhD, National Institute of Rheumatic Diseases, Piestany, Slovakia; B.R. Lauwerys, MD, PhD, Institut de Recherche Expérimentale et Clinique, Université catholique de Louvain and Department of Rheumatology, Cliniques Universitaires Saint-Luc, Brussels, Belgium; I. Calvo Penades, MD, PhD, Hospital Universitario y Politécnico La Fe, Pediatric Rheumatology Unit, Valencia, Spain; B. Flato, MD, PhD, Oslo University Hospital, Department of Rheumatology, Oslo, Norway; M.L. Gamir, MD, Hospital Ramon y Cajal Unidad de Reumatologia Pediatrica, Madrid, Spain; H.I. Huppertz, MD, Klinikum Bremen-Mitte, Prof. Hess-Kinderklinik, Bremen, Germany; J.J. Raad, MD, Centro de Reumatologia y Ortopedia, Barranquilla, Atlantico, Colombia; K. Jarosova, MD, Revmatologicky Ustav, Prague, Czech Republic; J. Anton, MD, PhD, Pediatric Rheumatology Unit, Hospital Sant Joan de Déu, Universitat de Barcelona, Espluges (Barcelona), Spain; M. Macku, MD, Fakultni nemocnice Brno, Bohunice, Detska Nemocnice, Ambulance detske revmatologie detske kliniky, Brno, Czech Republic; W.J. O
authors.forename: Elena
authors.initials: E
authors.lastname: Koskova
authors.affiliation: From the Paediatric Rheumatology International Trials Organisation (PRINTO), Istituto G. Gaslini, Pediatria II-Reumatologia, PRINTO, Genoa, Italy.T. Constantin, MD, PhD, 2nd Department of Pediatrics, Semmelweis University, Budapest, Hungary; I. Foeldvari, MD, Hamburg Centre for Child and Adolescent Rheumatology, Hamburg, Germany; J. Vojinovic, MD, PhD, Clinic of Pediatrics, Clinical Centre, Faculty of Medicine, University of Nis, Serbia; G. Horneff, MD, Asklepios Clinic, Sankt Augustin, Germany; R. Burgos-Vargas, MD, Hospital General de Mexico, Mexico City, Mexico; I. Nikishina, MD, V.A. Nasonova Research Institute of Rheumatology, Moscow, Russia; J.D. Akikusa, MD, Royal Children's Hospital Melbourne, Parkville, Victoria, Australia; T. Avcin, MD, PhD, University Medical Centre Ljubljana, Pediatric Clinic, Ljubljana, Slovenia; J. Chaitow, MD, The Sydney Children's Hospital Network, Westmead, Sydney, Australia; E. Koskova, MD, PhD, National Institute of Rheumatic Diseases, Piestany, Slovakia; B.R. Lauwerys, MD, PhD, Institut de Recherche Expérimentale et Clinique, Université catholique de Louvain and Department of Rheumatology, Cliniques Universitaires Saint-Luc, Brussels, Belgium; I. Calvo Penades, MD, PhD, Hospital Universitario y Politécnico La Fe, Pediatric Rheumatology Unit, Valencia, Spain; B. Flato, MD, PhD, Oslo University Hospital, Department of Rheumatology, Oslo, Norway; M.L. Gamir, MD, Hospital Ramon y Cajal Unidad de Reumatologia Pediatrica, Madrid, Spain; H.I. Huppertz, MD, Klinikum Bremen-Mitte, Prof. Hess-Kinderklinik, Bremen, Germany; J.J. Raad, MD, Centro de Reumatologia y Ortopedia, Barranquilla, Atlantico, Colombia; K. Jarosova, MD, Revmatologicky Ustav, Prague, Czech Republic; J. Anton, MD, PhD, Pediatric Rheumatology Unit, Hospital Sant Joan de Déu, Universitat de Barcelona, Espluges (Barcelona), Spain; M. Macku, MD, Fakultni nemocnice Brno, Bohunice, Detska Nemocnice, Ambulance detske revmatologie detske kliniky, Brno, Czech Republic; W.J. O
authors.forename: Bernard R
authors.initials: BR
authors.lastname: Lauwerys
authors.affiliation: From the Paediatric Rheumatology International Trials Organisation (PRINTO), Istituto G. Gaslini, Pediatria II-Reumatologia, PRINTO, Genoa, Italy.T. Constantin, MD, PhD, 2nd Department of Pediatrics, Semmelweis University, Budapest, Hungary; I. Foeldvari, MD, Hamburg Centre for Child and Adolescent Rheumatology, Hamburg, Germany; J. Vojinovic, MD, PhD, Clinic of Pediatrics, Clinical Centre, Faculty of Medicine, University of Nis, Serbia; G. Horneff, MD, Asklepios Clinic, Sankt Augustin, Germany; R. Burgos-Vargas, MD, Hospital General de Mexico, Mexico City, Mexico; I. Nikishina, MD, V.A. Nasonova Research Institute of Rheumatology, Moscow, Russia; J.D. Akikusa, MD, Royal Children's Hospital Melbourne, Parkville, Victoria, Australia; T. Avcin, MD, PhD, University Medical Centre Ljubljana, Pediatric Clinic, Ljubljana, Slovenia; J. Chaitow, MD, The Sydney Children's Hospital Network, Westmead, Sydney, Australia; E. Koskova, MD, PhD, National Institute of Rheumatic Diseases, Piestany, Slovakia; B.R. Lauwerys, MD, PhD, Institut de Recherche Expérimentale et Clinique, Université catholique de Louvain and Department of Rheumatology, Cliniques Universitaires Saint-Luc, Brussels, Belgium; I. Calvo Penades, MD, PhD, Hospital Universitario y Politécnico La Fe, Pediatric Rheumatology Unit, Valencia, Spain; B. Flato, MD, PhD, Oslo University Hospital, Department of Rheumatology, Oslo, Norway; M.L. Gamir, MD, Hospital Ramon y Cajal Unidad de Reumatologia Pediatrica, Madrid, Spain; H.I. Huppertz, MD, Klinikum Bremen-Mitte, Prof. Hess-Kinderklinik, Bremen, Germany; J.J. Raad, MD, Centro de Reumatologia y Ortopedia, Barranquilla, Atlantico, Colombia; K. Jarosova, MD, Revmatologicky Ustav, Prague, Czech Republic; J. Anton, MD, PhD, Pediatric Rheumatology Unit, Hospital Sant Joan de Déu, Universitat de Barcelona, Espluges (Barcelona), Spain; M. Macku, MD, Fakultni nemocnice Brno, Bohunice, Detska Nemocnice, Ambulance detske revmatologie detske kliniky, Brno, Czech Republic; W.J. O
authors.forename: Inmaculada
authors.initials: I
authors.lastname: Calvo Penades
authors.affiliation: From the Paediatric Rheumatology International Trials Organisation (PRINTO), Istituto G. Gaslini, Pediatria II-Reumatologia, PRINTO, Genoa, Italy.T. Constantin, MD, PhD, 2nd Department of Pediatrics, Semmelweis University, Budapest, Hungary; I. Foeldvari, MD, Hamburg Centre for Child and Adolescent Rheumatology, Hamburg, Germany; J. Vojinovic, MD, PhD, Clinic of Pediatrics, Clinical Centre, Faculty of Medicine, University of Nis, Serbia; G. Horneff, MD, Asklepios Clinic, Sankt Augustin, Germany; R. Burgos-Vargas, MD, Hospital General de Mexico, Mexico City, Mexico; I. Nikishina, MD, V.A. Nasonova Research Institute of Rheumatology, Moscow, Russia; J.D. Akikusa, MD, Royal Children's Hospital Melbourne, Parkville, Victoria, Australia; T. Avcin, MD, PhD, University Medical Centre Ljubljana, Pediatric Clinic, Ljubljana, Slovenia; J. Chaitow, MD, The Sydney Children's Hospital Network, Westmead, Sydney, Australia; E. Koskova, MD, PhD, National Institute of Rheumatic Diseases, Piestany, Slovakia; B.R. Lauwerys, MD, PhD, Institut de Recherche Expérimentale et Clinique, Université catholique de Louvain and Department of Rheumatology, Cliniques Universitaires Saint-Luc, Brussels, Belgium; I. Calvo Penades, MD, PhD, Hospital Universitario y Politécnico La Fe, Pediatric Rheumatology Unit, Valencia, Spain; B. Flato, MD, PhD, Oslo University Hospital, Department of Rheumatology, Oslo, Norway; M.L. Gamir, MD, Hospital Ramon y Cajal Unidad de Reumatologia Pediatrica, Madrid, Spain; H.I. Huppertz, MD, Klinikum Bremen-Mitte, Prof. Hess-Kinderklinik, Bremen, Germany; J.J. Raad, MD, Centro de Reumatologia y Ortopedia, Barranquilla, Atlantico, Colombia; K. Jarosova, MD, Revmatologicky Ustav, Prague, Czech Republic; J. Anton, MD, PhD, Pediatric Rheumatology Unit, Hospital Sant Joan de Déu, Universitat de Barcelona, Espluges (Barcelona), Spain; M. Macku, MD, Fakultni nemocnice Brno, Bohunice, Detska Nemocnice, Ambulance detske revmatologie detske kliniky, Brno, Czech Republic; W.J. O
authors.forename: Berit
authors.initials: B
authors.lastname: Flato
authors.affiliation: From the Paediatric Rheumatology International Trials Organisation (PRINTO), Istituto G. Gaslini, Pediatria II-Reumatologia, PRINTO, Genoa, Italy.T. Constantin, MD, PhD, 2nd Department of Pediatrics, Semmelweis University, Budapest, Hungary; I. Foeldvari, MD, Hamburg Centre for Child and Adolescent Rheumatology, Hamburg, Germany; J. Vojinovic, MD, PhD, Clinic of Pediatrics, Clinical Centre, Faculty of Medicine, University of Nis, Serbia; G. Horneff, MD, Asklepios Clinic, Sankt Augustin, Germany; R. Burgos-Vargas, MD, Hospital General de Mexico, Mexico City, Mexico; I. Nikishina, MD, V.A. Nasonova Research Institute of Rheumatology, Moscow, Russia; J.D. Akikusa, MD, Royal Children's Hospital Melbourne, Parkville, Victoria, Australia; T. Avcin, MD, PhD, University Medical Centre Ljubljana, Pediatric Clinic, Ljubljana, Slovenia; J. Chaitow, MD, The Sydney Children's Hospital Network, Westmead, Sydney, Australia; E. Koskova, MD, PhD, National Institute of Rheumatic Diseases, Piestany, Slovakia; B.R. Lauwerys, MD, PhD, Institut de Recherche Expérimentale et Clinique, Université catholique de Louvain and Department of Rheumatology, Cliniques Universitaires Saint-Luc, Brussels, Belgium; I. Calvo Penades, MD, PhD, Hospital Universitario y Politécnico La Fe, Pediatric Rheumatology Unit, Valencia, Spain; B. Flato, MD, PhD, Oslo University Hospital, Department of Rheumatology, Oslo, Norway; M.L. Gamir, MD, Hospital Ramon y Cajal Unidad de Reumatologia Pediatrica, Madrid, Spain; H.I. Huppertz, MD, Klinikum Bremen-Mitte, Prof. Hess-Kinderklinik, Bremen, Germany; J.J. Raad, MD, Centro de Reumatologia y Ortopedia, Barranquilla, Atlantico, Colombia; K. Jarosova, MD, Revmatologicky Ustav, Prague, Czech Republic; J. Anton, MD, PhD, Pediatric Rheumatology Unit, Hospital Sant Joan de Déu, Universitat de Barcelona, Espluges (Barcelona), Spain; M. Macku, MD, Fakultni nemocnice Brno, Bohunice, Detska Nemocnice, Ambulance detske revmatologie detske kliniky, Brno, Czech Republic; W.J. O
authors.forename: Maria Luz
authors.initials: ML
authors.lastname: Gamir
authors.affiliation: From the Paediatric Rheumatology International Trials Organisation (PRINTO), Istituto G. Gaslini, Pediatria II-Reumatologia, PRINTO, Genoa, Italy.T. Constantin, MD, PhD, 2nd Department of Pediatrics, Semmelweis University, Budapest, Hungary; I. Foeldvari, MD, Hamburg Centre for Child and Adolescent Rheumatology, Hamburg, Germany; J. Vojinovic, MD, PhD, Clinic of Pediatrics, Clinical Centre, Faculty of Medicine, University of Nis, Serbia; G. Horneff, MD, Asklepios Clinic, Sankt Augustin, Germany; R. Burgos-Vargas, MD, Hospital General de Mexico, Mexico City, Mexico; I. Nikishina, MD, V.A. Nasonova Research Institute of Rheumatology, Moscow, Russia; J.D. Akikusa, MD, Royal Children's Hospital Melbourne, Parkville, Victoria, Australia; T. Avcin, MD, PhD, University Medical Centre Ljubljana, Pediatric Clinic, Ljubljana, Slovenia; J. Chaitow, MD, The Sydney Children's Hospital Network, Westmead, Sydney, Australia; E. Koskova, MD, PhD, National Institute of Rheumatic Diseases, Piestany, Slovakia; B.R. Lauwerys, MD, PhD, Institut de Recherche Expérimentale et Clinique, Université catholique de Louvain and Department of Rheumatology, Cliniques Universitaires Saint-Luc, Brussels, Belgium; I. Calvo Penades, MD, PhD, Hospital Universitario y Politécnico La Fe, Pediatric Rheumatology Unit, Valencia, Spain; B. Flato, MD, PhD, Oslo University Hospital, Department of Rheumatology, Oslo, Norway; M.L. Gamir, MD, Hospital Ramon y Cajal Unidad de Reumatologia Pediatrica, Madrid, Spain; H.I. Huppertz, MD, Klinikum Bremen-Mitte, Prof. Hess-Kinderklinik, Bremen, Germany; J.J. Raad, MD, Centro de Reumatologia y Ortopedia, Barranquilla, Atlantico, Colombia; K. Jarosova, MD, Revmatologicky Ustav, Prague, Czech Republic; J. Anton, MD, PhD, Pediatric Rheumatology Unit, Hospital Sant Joan de Déu, Universitat de Barcelona, Espluges (Barcelona), Spain; M. Macku, MD, Fakultni nemocnice Brno, Bohunice, Detska Nemocnice, Ambulance detske revmatologie detske kliniky, Brno, Czech Republic; W.J. O
authors.forename: Hans-Iko
authors.initials: HI
authors.lastname: Huppertz
authors.affiliation: From the Paediatric Rheumatology International Trials Organisation (PRINTO), Istituto G. Gaslini, Pediatria II-Reumatologia, PRINTO, Genoa, Italy.T. Constantin, MD, PhD, 2nd Department of Pediatrics, Semmelweis University, Budapest, Hungary; I. Foeldvari, MD, Hamburg Centre for Child and Adolescent Rheumatology, Hamburg, Germany; J. Vojinovic, MD, PhD, Clinic of Pediatrics, Clinical Centre, Faculty of Medicine, University of Nis, Serbia; G. Horneff, MD, Asklepios Clinic, Sankt Augustin, Germany; R. Burgos-Vargas, MD, Hospital General de Mexico, Mexico City, Mexico; I. Nikishina, MD, V.A. Nasonova Research Institute of Rheumatology, Moscow, Russia; J.D. Akikusa, MD, Royal Children's Hospital Melbourne, Parkville, Victoria, Australia; T. Avcin, MD, PhD, University Medical Centre Ljubljana, Pediatric Clinic, Ljubljana, Slovenia; J. Chaitow, MD, The Sydney Children's Hospital Network, Westmead, Sydney, Australia; E. Koskova, MD, PhD, National Institute of Rheumatic Diseases, Piestany, Slovakia; B.R. Lauwerys, MD, PhD, Institut de Recherche Expérimentale et Clinique, Université catholique de Louvain and Department of Rheumatology, Cliniques Universitaires Saint-Luc, Brussels, Belgium; I. Calvo Penades, MD, PhD, Hospital Universitario y Politécnico La Fe, Pediatric Rheumatology Unit, Valencia, Spain; B. Flato, MD, PhD, Oslo University Hospital, Department of Rheumatology, Oslo, Norway; M.L. Gamir, MD, Hospital Ramon y Cajal Unidad de Reumatologia Pediatrica, Madrid, Spain; H.I. Huppertz, MD, Klinikum Bremen-Mitte, Prof. Hess-Kinderklinik, Bremen, Germany; J.J. Raad, MD, Centro de Reumatologia y Ortopedia, Barranquilla, Atlantico, Colombia; K. Jarosova, MD, Revmatologicky Ustav, Prague, Czech Republic; J. Anton, MD, PhD, Pediatric Rheumatology Unit, Hospital Sant Joan de Déu, Universitat de Barcelona, Espluges (Barcelona), Spain; M. Macku, MD, Fakultni nemocnice Brno, Bohunice, Detska Nemocnice, Ambulance detske revmatologie detske kliniky, Brno, Czech Republic; W.J. O
authors.forename: Juan Jose
authors.initials: JJ
authors.lastname: Jaller Raad
authors.affiliation: From the Paediatric Rheumatology International Trials Organisation (PRINTO), Istituto G. Gaslini, Pediatria II-Reumatologia, PRINTO, Genoa, Italy.T. Constantin, MD, PhD, 2nd Department of Pediatrics, Semmelweis University, Budapest, Hungary; I. Foeldvari, MD, Hamburg Centre for Child and Adolescent Rheumatology, Hamburg, Germany; J. Vojinovic, MD, PhD, Clinic of Pediatrics, Clinical Centre, Faculty of Medicine, University of Nis, Serbia; G. Horneff, MD, Asklepios Clinic, Sankt Augustin, Germany; R. Burgos-Vargas, MD, Hospital General de Mexico, Mexico City, Mexico; I. Nikishina, MD, V.A. Nasonova Research Institute of Rheumatology, Moscow, Russia; J.D. Akikusa, MD, Royal Children's Hospital Melbourne, Parkville, Victoria, Australia; T. Avcin, MD, PhD, University Medical Centre Ljubljana, Pediatric Clinic, Ljubljana, Slovenia; J. Chaitow, MD, The Sydney Children's Hospital Network, Westmead, Sydney, Australia; E. Koskova, MD, PhD, National Institute of Rheumatic Diseases, Piestany, Slovakia; B.R. Lauwerys, MD, PhD, Institut de Recherche Expérimentale et Clinique, Université catholique de Louvain and Department of Rheumatology, Cliniques Universitaires Saint-Luc, Brussels, Belgium; I. Calvo Penades, MD, PhD, Hospital Universitario y Politécnico La Fe, Pediatric Rheumatology Unit, Valencia, Spain; B. Flato, MD, PhD, Oslo University Hospital, Department of Rheumatology, Oslo, Norway; M.L. Gamir, MD, Hospital Ramon y Cajal Unidad de Reumatologia Pediatrica, Madrid, Spain; H.I. Huppertz, MD, Klinikum Bremen-Mitte, Prof. Hess-Kinderklinik, Bremen, Germany; J.J. Raad, MD, Centro de Reumatologia y Ortopedia, Barranquilla, Atlantico, Colombia; K. Jarosova, MD, Revmatologicky Ustav, Prague, Czech Republic; J. Anton, MD, PhD, Pediatric Rheumatology Unit, Hospital Sant Joan de Déu, Universitat de Barcelona, Espluges (Barcelona), Spain; M. Macku, MD, Fakultni nemocnice Brno, Bohunice, Detska Nemocnice, Ambulance detske revmatologie detske kliniky, Brno, Czech Republic; W.J. O
authors.forename: Katerina
authors.initials: K
authors.lastname: Jarosova
authors.affiliation: From the Paediatric Rheumatology International Trials Organisation (PRINTO), Istituto G. Gaslini, Pediatria II-Reumatologia, PRINTO, Genoa, Italy.T. Constantin, MD, PhD, 2nd Department of Pediatrics, Semmelweis University, Budapest, Hungary; I. Foeldvari, MD, Hamburg Centre for Child and Adolescent Rheumatology, Hamburg, Germany; J. Vojinovic, MD, PhD, Clinic of Pediatrics, Clinical Centre, Faculty of Medicine, University of Nis, Serbia; G. Horneff, MD, Asklepios Clinic, Sankt Augustin, Germany; R. Burgos-Vargas, MD, Hospital General de Mexico, Mexico City, Mexico; I. Nikishina, MD, V.A. Nasonova Research Institute of Rheumatology, Moscow, Russia; J.D. Akikusa, MD, Royal Children's Hospital Melbourne, Parkville, Victoria, Australia; T. Avcin, MD, PhD, University Medical Centre Ljubljana, Pediatric Clinic, Ljubljana, Slovenia; J. Chaitow, MD, The Sydney Children's Hospital Network, Westmead, Sydney, Australia; E. Koskova, MD, PhD, National Institute of Rheumatic Diseases, Piestany, Slovakia; B.R. Lauwerys, MD, PhD, Institut de Recherche Expérimentale et Clinique, Université catholique de Louvain and Department of Rheumatology, Cliniques Universitaires Saint-Luc, Brussels, Belgium; I. Calvo Penades, MD, PhD, Hospital Universitario y Politécnico La Fe, Pediatric Rheumatology Unit, Valencia, Spain; B. Flato, MD, PhD, Oslo University Hospital, Department of Rheumatology, Oslo, Norway; M.L. Gamir, MD, Hospital Ramon y Cajal Unidad de Reumatologia Pediatrica, Madrid, Spain; H.I. Huppertz, MD, Klinikum Bremen-Mitte, Prof. Hess-Kinderklinik, Bremen, Germany; J.J. Raad, MD, Centro de Reumatologia y Ortopedia, Barranquilla, Atlantico, Colombia; K. Jarosova, MD, Revmatologicky Ustav, Prague, Czech Republic; J. Anton, MD, PhD, Pediatric Rheumatology Unit, Hospital Sant Joan de Déu, Universitat de Barcelona, Espluges (Barcelona), Spain; M. Macku, MD, Fakultni nemocnice Brno, Bohunice, Detska Nemocnice, Ambulance detske revmatologie detske kliniky, Brno, Czech Republic; W.J. O
authors.forename: Jordi
authors.initials: J
authors.lastname: Anton
authors.affiliation: From the Paediatric Rheumatology International Trials Organisation (PRINTO), Istituto G. Gaslini, Pediatria II-Reumatologia, PRINTO, Genoa, Italy.T. Constantin, MD, PhD, 2nd Department of Pediatrics, Semmelweis University, Budapest, Hungary; I. Foeldvari, MD, Hamburg Centre for Child and Adolescent Rheumatology, Hamburg, Germany; J. Vojinovic, MD, PhD, Clinic of Pediatrics, Clinical Centre, Faculty of Medicine, University of Nis, Serbia; G. Horneff, MD, Asklepios Clinic, Sankt Augustin, Germany; R. Burgos-Vargas, MD, Hospital General de Mexico, Mexico City, Mexico; I. Nikishina, MD, V.A. Nasonova Research Institute of Rheumatology, Moscow, Russia; J.D. Akikusa, MD, Royal Children's Hospital Melbourne, Parkville, Victoria, Australia; T. Avcin, MD, PhD, University Medical Centre Ljubljana, Pediatric Clinic, Ljubljana, Slovenia; J. Chaitow, MD, The Sydney Children's Hospital Network, Westmead, Sydney, Australia; E. Koskova, MD, PhD, National Institute of Rheumatic Diseases, Piestany, Slovakia; B.R. Lauwerys, MD, PhD, Institut de Recherche Expérimentale et Clinique, Université catholique de Louvain and Department of Rheumatology, Cliniques Universitaires Saint-Luc, Brussels, Belgium; I. Calvo Penades, MD, PhD, Hospital Universitario y Politécnico La Fe, Pediatric Rheumatology Unit, Valencia, Spain; B. Flato, MD, PhD, Oslo University Hospital, Department of Rheumatology, Oslo, Norway; M.L. Gamir, MD, Hospital Ramon y Cajal Unidad de Reumatologia Pediatrica, Madrid, Spain; H.I. Huppertz, MD, Klinikum Bremen-Mitte, Prof. Hess-Kinderklinik, Bremen, Germany; J.J. Raad, MD, Centro de Reumatologia y Ortopedia, Barranquilla, Atlantico, Colombia; K. Jarosova, MD, Revmatologicky Ustav, Prague, Czech Republic; J. Anton, MD, PhD, Pediatric Rheumatology Unit, Hospital Sant Joan de Déu, Universitat de Barcelona, Espluges (Barcelona), Spain; M. Macku, MD, Fakultni nemocnice Brno, Bohunice, Detska Nemocnice, Ambulance detske revmatologie detske kliniky, Brno, Czech Republic; W.J. O
authors.forename: Marie
authors.initials: M
authors.lastname: Macku
authors.affiliation: From the Paediatric Rheumatology International Trials Organisation (PRINTO), Istituto G. Gaslini, Pediatria II-Reumatologia, PRINTO, Genoa, Italy.T. Constantin, MD, PhD, 2nd Department of Pediatrics, Semmelweis University, Budapest, Hungary; I. Foeldvari, MD, Hamburg Centre for Child and Adolescent Rheumatology, Hamburg, Germany; J. Vojinovic, MD, PhD, Clinic of Pediatrics, Clinical Centre, Faculty of Medicine, University of Nis, Serbia; G. Horneff, MD, Asklepios Clinic, Sankt Augustin, Germany; R. Burgos-Vargas, MD, Hospital General de Mexico, Mexico City, Mexico; I. Nikishina, MD, V.A. Nasonova Research Institute of Rheumatology, Moscow, Russia; J.D. Akikusa, MD, Royal Children's Hospital Melbourne, Parkville, Victoria, Australia; T. Avcin, MD, PhD, University Medical Centre Ljubljana, Pediatric Clinic, Ljubljana, Slovenia; J. Chaitow, MD, The Sydney Children's Hospital Network, Westmead, Sydney, Australia; E. Koskova, MD, PhD, National Institute of Rheumatic Diseases, Piestany, Slovakia; B.R. Lauwerys, MD, PhD, Institut de Recherche Expérimentale et Clinique, Université catholique de Louvain and Department of Rheumatology, Cliniques Universitaires Saint-Luc, Brussels, Belgium; I. Calvo Penades, MD, PhD, Hospital Universitario y Politécnico La Fe, Pediatric Rheumatology Unit, Valencia, Spain; B. Flato, MD, PhD, Oslo University Hospital, Department of Rheumatology, Oslo, Norway; M.L. Gamir, MD, Hospital Ramon y Cajal Unidad de Reumatologia Pediatrica, Madrid, Spain; H.I. Huppertz, MD, Klinikum Bremen-Mitte, Prof. Hess-Kinderklinik, Bremen, Germany; J.J. Raad, MD, Centro de Reumatologia y Ortopedia, Barranquilla, Atlantico, Colombia; K. Jarosova, MD, Revmatologicky Ustav, Prague, Czech Republic; J. Anton, MD, PhD, Pediatric Rheumatology Unit, Hospital Sant Joan de Déu, Universitat de Barcelona, Espluges (Barcelona), Spain; M. Macku, MD, Fakultni nemocnice Brno, Bohunice, Detska Nemocnice, Ambulance detske revmatologie detske kliniky, Brno, Czech Republic; W.J. O
authors.forename: William J
authors.initials: WJ
authors.lastname: Otero Escalante
authors.affiliation: From the Paediatric Rheumatology International Trials Organisation (PRINTO), Istituto G. Gaslini, Pediatria II-Reumatologia, PRINTO, Genoa, Italy.T. Constantin, MD, PhD, 2nd Department of Pediatrics, Semmelweis University, Budapest, Hungary; I. Foeldvari, MD, Hamburg Centre for Child and Adolescent Rheumatology, Hamburg, Germany; J. Vojinovic, MD, PhD, Clinic of Pediatrics, Clinical Centre, Faculty of Medicine, University of Nis, Serbia; G. Horneff, MD, Asklepios Clinic, Sankt Augustin, Germany; R. Burgos-Vargas, MD, Hospital General de Mexico, Mexico City, Mexico; I. Nikishina, MD, V.A. Nasonova Research Institute of Rheumatology, Moscow, Russia; J.D. Akikusa, MD, Royal Children's Hospital Melbourne, Parkville, Victoria, Australia; T. Avcin, MD, PhD, University Medical Centre Ljubljana, Pediatric Clinic, Ljubljana, Slovenia; J. Chaitow, MD, The Sydney Children's Hospital Network, Westmead, Sydney, Australia; E. Koskova, MD, PhD, National Institute of Rheumatic Diseases, Piestany, Slovakia; B.R. Lauwerys, MD, PhD, Institut de Recherche Expérimentale et Clinique, Université catholique de Louvain and Department of Rheumatology, Cliniques Universitaires Saint-Luc, Brussels, Belgium; I. Calvo Penades, MD, PhD, Hospital Universitario y Politécnico La Fe, Pediatric Rheumatology Unit, Valencia, Spain; B. Flato, MD, PhD, Oslo University Hospital, Department of Rheumatology, Oslo, Norway; M.L. Gamir, MD, Hospital Ramon y Cajal Unidad de Reumatologia Pediatrica, Madrid, Spain; H.I. Huppertz, MD, Klinikum Bremen-Mitte, Prof. Hess-Kinderklinik, Bremen, Germany; J.J. Raad, MD, Centro de Reumatologia y Ortopedia, Barranquilla, Atlantico, Colombia; K. Jarosova, MD, Revmatologicky Ustav, Prague, Czech Republic; J. Anton, MD, PhD, Pediatric Rheumatology Unit, Hospital Sant Joan de Déu, Universitat de Barcelona, Espluges (Barcelona), Spain; M. Macku, MD, Fakultni nemocnice Brno, Bohunice, Detska Nemocnice, Ambulance detske revmatologie detske kliniky, Brno, Czech Republic; W.J. O
authors.forename: Lidia
authors.initials: L
authors.lastname: Rutkowska-Sak
authors.affiliation: From the Paediatric Rheumatology International Trials Organisation (PRINTO), Istituto G. Gaslini, Pediatria II-Reumatologia, PRINTO, Genoa, Italy.T. Constantin, MD, PhD, 2nd Department of Pediatrics, Semmelweis University, Budapest, Hungary; I. Foeldvari, MD, Hamburg Centre for Child and Adolescent Rheumatology, Hamburg, Germany; J. Vojinovic, MD, PhD, Clinic of Pediatrics, Clinical Centre, Faculty of Medicine, University of Nis, Serbia; G. Horneff, MD, Asklepios Clinic, Sankt Augustin, Germany; R. Burgos-Vargas, MD, Hospital General de Mexico, Mexico City, Mexico; I. Nikishina, MD, V.A. Nasonova Research Institute of Rheumatology, Moscow, Russia; J.D. Akikusa, MD, Royal Children's Hospital Melbourne, Parkville, Victoria, Australia; T. Avcin, MD, PhD, University Medical Centre Ljubljana, Pediatric Clinic, Ljubljana, Slovenia; J. Chaitow, MD, The Sydney Children's Hospital Network, Westmead, Sydney, Australia; E. Koskova, MD, PhD, National Institute of Rheumatic Diseases, Piestany, Slovakia; B.R. Lauwerys, MD, PhD, Institut de Recherche Expérimentale et Clinique, Université catholique de Louvain and Department of Rheumatology, Cliniques Universitaires Saint-Luc, Brussels, Belgium; I. Calvo Penades, MD, PhD, Hospital Universitario y Politécnico La Fe, Pediatric Rheumatology Unit, Valencia, Spain; B. Flato, MD, PhD, Oslo University Hospital, Department of Rheumatology, Oslo, Norway; M.L. Gamir, MD, Hospital Ramon y Cajal Unidad de Reumatologia Pediatrica, Madrid, Spain; H.I. Huppertz, MD, Klinikum Bremen-Mitte, Prof. Hess-Kinderklinik, Bremen, Germany; J.J. Raad, MD, Centro de Reumatologia y Ortopedia, Barranquilla, Atlantico, Colombia; K. Jarosova, MD, Revmatologicky Ustav, Prague, Czech Republic; J. Anton, MD, PhD, Pediatric Rheumatology Unit, Hospital Sant Joan de Déu, Universitat de Barcelona, Espluges (Barcelona), Spain; M. Macku, MD, Fakultni nemocnice Brno, Bohunice, Detska Nemocnice, Ambulance detske revmatologie detske kliniky, Brno, Czech Republic; W.J. O
authors.forename: Ralf
authors.initials: R
authors.lastname: Trauzeddel
authors.affiliation: From the Paediatric Rheumatology International Trials Organisation (PRINTO), Istituto G. Gaslini, Pediatria II-Reumatologia, PRINTO, Genoa, Italy.T. Constantin, MD, PhD, 2nd Department of Pediatrics, Semmelweis University, Budapest, Hungary; I. Foeldvari, MD, Hamburg Centre for Child and Adolescent Rheumatology, Hamburg, Germany; J. Vojinovic, MD, PhD, Clinic of Pediatrics, Clinical Centre, Faculty of Medicine, University of Nis, Serbia; G. Horneff, MD, Asklepios Clinic, Sankt Augustin, Germany; R. Burgos-Vargas, MD, Hospital General de Mexico, Mexico City, Mexico; I. Nikishina, MD, V.A. Nasonova Research Institute of Rheumatology, Moscow, Russia; J.D. Akikusa, MD, Royal Children's Hospital Melbourne, Parkville, Victoria, Australia; T. Avcin, MD, PhD, University Medical Centre Ljubljana, Pediatric Clinic, Ljubljana, Slovenia; J. Chaitow, MD, The Sydney Children's Hospital Network, Westmead, Sydney, Australia; E. Koskova, MD, PhD, National Institute of Rheumatic Diseases, Piestany, Slovakia; B.R. Lauwerys, MD, PhD, Institut de Recherche Expérimentale et Clinique, Université catholique de Louvain and Department of Rheumatology, Cliniques Universitaires Saint-Luc, Brussels, Belgium; I. Calvo Penades, MD, PhD, Hospital Universitario y Politécnico La Fe, Pediatric Rheumatology Unit, Valencia, Spain; B. Flato, MD, PhD, Oslo University Hospital, Department of Rheumatology, Oslo, Norway; M.L. Gamir, MD, Hospital Ramon y Cajal Unidad de Reumatologia Pediatrica, Madrid, Spain; H.I. Huppertz, MD, Klinikum Bremen-Mitte, Prof. Hess-Kinderklinik, Bremen, Germany; J.J. Raad, MD, Centro de Reumatologia y Ortopedia, Barranquilla, Atlantico, Colombia; K. Jarosova, MD, Revmatologicky Ustav, Prague, Czech Republic; J. Anton, MD, PhD, Pediatric Rheumatology Unit, Hospital Sant Joan de Déu, Universitat de Barcelona, Espluges (Barcelona), Spain; M. Macku, MD, Fakultni nemocnice Brno, Bohunice, Detska Nemocnice, Ambulance detske revmatologie detske kliniky, Brno, Czech Republic; W.J. O
authors.forename: Patricia J
authors.initials: PJ
authors.lastname: Velez-Sanchez
authors.affiliation: From the Paediatric Rheumatology International Trials Organisation (PRINTO), Istituto G. Gaslini, Pediatria II-Reumatologia, PRINTO, Genoa, Italy.T. Constantin, MD, PhD, 2nd Department of Pediatrics, Semmelweis University, Budapest, Hungary; I. Foeldvari, MD, Hamburg Centre for Child and Adolescent Rheumatology, Hamburg, Germany; J. Vojinovic, MD, PhD, Clinic of Pediatrics, Clinical Centre, Faculty of Medicine, University of Nis, Serbia; G. Horneff, MD, Asklepios Clinic, Sankt Augustin, Germany; R. Burgos-Vargas, MD, Hospital General de Mexico, Mexico City, Mexico; I. Nikishina, MD, V.A. Nasonova Research Institute of Rheumatology, Moscow, Russia; J.D. Akikusa, MD, Royal Children's Hospital Melbourne, Parkville, Victoria, Australia; T. Avcin, MD, PhD, University Medical Centre Ljubljana, Pediatric Clinic, Ljubljana, Slovenia; J. Chaitow, MD, The Sydney Children's Hospital Network, Westmead, Sydney, Australia; E. Koskova, MD, PhD, National Institute of Rheumatic Diseases, Piestany, Slovakia; B.R. Lauwerys, MD, PhD, Institut de Recherche Expérimentale et Clinique, Université catholique de Louvain and Department of Rheumatology, Cliniques Universitaires Saint-Luc, Brussels, Belgium; I. Calvo Penades, MD, PhD, Hospital Universitario y Politécnico La Fe, Pediatric Rheumatology Unit, Valencia, Spain; B. Flato, MD, PhD, Oslo University Hospital, Department of Rheumatology, Oslo, Norway; M.L. Gamir, MD, Hospital Ramon y Cajal Unidad de Reumatologia Pediatrica, Madrid, Spain; H.I. Huppertz, MD, Klinikum Bremen-Mitte, Prof. Hess-Kinderklinik, Bremen, Germany; J.J. Raad, MD, Centro de Reumatologia y Ortopedia, Barranquilla, Atlantico, Colombia; K. Jarosova, MD, Revmatologicky Ustav, Prague, Czech Republic; J. Anton, MD, PhD, Pediatric Rheumatology Unit, Hospital Sant Joan de Déu, Universitat de Barcelona, Espluges (Barcelona), Spain; M. Macku, MD, Fakultni nemocnice Brno, Bohunice, Detska Nemocnice, Ambulance detske revmatologie detske kliniky, Brno, Czech Republic; W.J. O
authors.forename: Carine
authors.initials: C
authors.lastname: Wouters
authors.affiliation: From the Paediatric Rheumatology International Trials Organisation (PRINTO), Istituto G. Gaslini, Pediatria II-Reumatologia, PRINTO, Genoa, Italy.T. Constantin, MD, PhD, 2nd Department of Pediatrics, Semmelweis University, Budapest, Hungary; I. Foeldvari, MD, Hamburg Centre for Child and Adolescent Rheumatology, Hamburg, Germany; J. Vojinovic, MD, PhD, Clinic of Pediatrics, Clinical Centre, Faculty of Medicine, University of Nis, Serbia; G. Horneff, MD, Asklepios Clinic, Sankt Augustin, Germany; R. Burgos-Vargas, MD, Hospital General de Mexico, Mexico City, Mexico; I. Nikishina, MD, V.A. Nasonova Research Institute of Rheumatology, Moscow, Russia; J.D. Akikusa, MD, Royal Children's Hospital Melbourne, Parkville, Victoria, Australia; T. Avcin, MD, PhD, University Medical Centre Ljubljana, Pediatric Clinic, Ljubljana, Slovenia; J. Chaitow, MD, The Sydney Children's Hospital Network, Westmead, Sydney, Australia; E. Koskova, MD, PhD, National Institute of Rheumatic Diseases, Piestany, Slovakia; B.R. Lauwerys, MD, PhD, Institut de Recherche Expérimentale et Clinique, Université catholique de Louvain and Department of Rheumatology, Cliniques Universitaires Saint-Luc, Brussels, Belgium; I. Calvo Penades, MD, PhD, Hospital Universitario y Politécnico La Fe, Pediatric Rheumatology Unit, Valencia, Spain; B. Flato, MD, PhD, Oslo University Hospital, Department of Rheumatology, Oslo, Norway; M.L. Gamir, MD, Hospital Ramon y Cajal Unidad de Reumatologia Pediatrica, Madrid, Spain; H.I. Huppertz, MD, Klinikum Bremen-Mitte, Prof. Hess-Kinderklinik, Bremen, Germany; J.J. Raad, MD, Centro de Reumatologia y Ortopedia, Barranquilla, Atlantico, Colombia; K. Jarosova, MD, Revmatologicky Ustav, Prague, Czech Republic; J. Anton, MD, PhD, Pediatric Rheumatology Unit, Hospital Sant Joan de Déu, Universitat de Barcelona, Espluges (Barcelona), Spain; M. Macku, MD, Fakultni nemocnice Brno, Bohunice, Detska Nemocnice, Ambulance detske revmatologie detske kliniky, Brno, Czech Republic; W.J. O
authors.forename: Joseph
authors.initials: J
authors.lastname: Wajdula
authors.affiliation: From the Paediatric Rheumatology International Trials Organisation (PRINTO), Istituto G. Gaslini, Pediatria II-Reumatologia, PRINTO, Genoa, Italy.T. Constantin, MD, PhD, 2nd Department of Pediatrics, Semmelweis University, Budapest, Hungary; I. Foeldvari, MD, Hamburg Centre for Child and Adolescent Rheumatology, Hamburg, Germany; J. Vojinovic, MD, PhD, Clinic of Pediatrics, Clinical Centre, Faculty of Medicine, University of Nis, Serbia; G. Horneff, MD, Asklepios Clinic, Sankt Augustin, Germany; R. Burgos-Vargas, MD, Hospital General de Mexico, Mexico City, Mexico; I. Nikishina, MD, V.A. Nasonova Research Institute of Rheumatology, Moscow, Russia; J.D. Akikusa, MD, Royal Children's Hospital Melbourne, Parkville, Victoria, Australia; T. Avcin, MD, PhD, University Medical Centre Ljubljana, Pediatric Clinic, Ljubljana, Slovenia; J. Chaitow, MD, The Sydney Children's Hospital Network, Westmead, Sydney, Australia; E. Koskova, MD, PhD, National Institute of Rheumatic Diseases, Piestany, Slovakia; B.R. Lauwerys, MD, PhD, Institut de Recherche Expérimentale et Clinique, Université catholique de Louvain and Department of Rheumatology, Cliniques Universitaires Saint-Luc, Brussels, Belgium; I. Calvo Penades, MD, PhD, Hospital Universitario y Politécnico La Fe, Pediatric Rheumatology Unit, Valencia, Spain; B. Flato, MD, PhD, Oslo University Hospital, Department of Rheumatology, Oslo, Norway; M.L. Gamir, MD, Hospital Ramon y Cajal Unidad de Reumatologia Pediatrica, Madrid, Spain; H.I. Huppertz, MD, Klinikum Bremen-Mitte, Prof. Hess-Kinderklinik, Bremen, Germany; J.J. Raad, MD, Centro de Reumatologia y Ortopedia, Barranquilla, Atlantico, Colombia; K. Jarosova, MD, Revmatologicky Ustav, Prague, Czech Republic; J. Anton, MD, PhD, Pediatric Rheumatology Unit, Hospital Sant Joan de Déu, Universitat de Barcelona, Espluges (Barcelona), Spain; M. Macku, MD, Fakultni nemocnice Brno, Bohunice, Detska Nemocnice, Ambulance detske revmatologie detske kliniky, Brno, Czech Republic; W.J. O
authors.forename: Chuanbo
authors.initials: C
authors.lastname: Zang
authors.affiliation: From the Paediatric Rheumatology International Trials Organisation (PRINTO), Istituto G. Gaslini, Pediatria II-Reumatologia, PRINTO, Genoa, Italy.T. Constantin, MD, PhD, 2nd Department of Pediatrics, Semmelweis University, Budapest, Hungary; I. Foeldvari, MD, Hamburg Centre for Child and Adolescent Rheumatology, Hamburg, Germany; J. Vojinovic, MD, PhD, Clinic of Pediatrics, Clinical Centre, Faculty of Medicine, University of Nis, Serbia; G. Horneff, MD, Asklepios Clinic, Sankt Augustin, Germany; R. Burgos-Vargas, MD, Hospital General de Mexico, Mexico City, Mexico; I. Nikishina, MD, V.A. Nasonova Research Institute of Rheumatology, Moscow, Russia; J.D. Akikusa, MD, Royal Children's Hospital Melbourne, Parkville, Victoria, Australia; T. Avcin, MD, PhD, University Medical Centre Ljubljana, Pediatric Clinic, Ljubljana, Slovenia; J. Chaitow, MD, The Sydney Children's Hospital Network, Westmead, Sydney, Australia; E. Koskova, MD, PhD, National Institute of Rheumatic Diseases, Piestany, Slovakia; B.R. Lauwerys, MD, PhD, Institut de Recherche Expérimentale et Clinique, Université catholique de Louvain and Department of Rheumatology, Cliniques Universitaires Saint-Luc, Brussels, Belgium; I. Calvo Penades, MD, PhD, Hospital Universitario y Politécnico La Fe, Pediatric Rheumatology Unit, Valencia, Spain; B. Flato, MD, PhD, Oslo University Hospital, Department of Rheumatology, Oslo, Norway; M.L. Gamir, MD, Hospital Ramon y Cajal Unidad de Reumatologia Pediatrica, Madrid, Spain; H.I. Huppertz, MD, Klinikum Bremen-Mitte, Prof. Hess-Kinderklinik, Bremen, Germany; J.J. Raad, MD, Centro de Reumatologia y Ortopedia, Barranquilla, Atlantico, Colombia; K. Jarosova, MD, Revmatologicky Ustav, Prague, Czech Republic; J. Anton, MD, PhD, Pediatric Rheumatology Unit, Hospital Sant Joan de Déu, Universitat de Barcelona, Espluges (Barcelona), Spain; M. Macku, MD, Fakultni nemocnice Brno, Bohunice, Detska Nemocnice, Ambulance detske revmatologie detske kliniky, Brno, Czech Republic; W.J. O
authors.forename: Jack
authors.initials: J
authors.lastname: Bukowski
authors.affiliation: From the Paediatric Rheumatology International Trials Organisation (PRINTO), Istituto G. Gaslini, Pediatria II-Reumatologia, PRINTO, Genoa, Italy.T. Constantin, MD, PhD, 2nd Department of Pediatrics, Semmelweis University, Budapest, Hungary; I. Foeldvari, MD, Hamburg Centre for Child and Adolescent Rheumatology, Hamburg, Germany; J. Vojinovic, MD, PhD, Clinic of Pediatrics, Clinical Centre, Faculty of Medicine, University of Nis, Serbia; G. Horneff, MD, Asklepios Clinic, Sankt Augustin, Germany; R. Burgos-Vargas, MD, Hospital General de Mexico, Mexico City, Mexico; I. Nikishina, MD, V.A. Nasonova Research Institute of Rheumatology, Moscow, Russia; J.D. Akikusa, MD, Royal Children's Hospital Melbourne, Parkville, Victoria, Australia; T. Avcin, MD, PhD, University Medical Centre Ljubljana, Pediatric Clinic, Ljubljana, Slovenia; J. Chaitow, MD, The Sydney Children's Hospital Network, Westmead, Sydney, Australia; E. Koskova, MD, PhD, National Institute of Rheumatic Diseases, Piestany, Slovakia; B.R. Lauwerys, MD, PhD, Institut de Recherche Expérimentale et Clinique, Université catholique de Louvain and Department of Rheumatology, Cliniques Universitaires Saint-Luc, Brussels, Belgium; I. Calvo Penades, MD, PhD, Hospital Universitario y Politécnico La Fe, Pediatric Rheumatology Unit, Valencia, Spain; B. Flato, MD, PhD, Oslo University Hospital, Department of Rheumatology, Oslo, Norway; M.L. Gamir, MD, Hospital Ramon y Cajal Unidad de Reumatologia Pediatrica, Madrid, Spain; H.I. Huppertz, MD, Klinikum Bremen-Mitte, Prof. Hess-Kinderklinik, Bremen, Germany; J.J. Raad, MD, Centro de Reumatologia y Ortopedia, Barranquilla, Atlantico, Colombia; K. Jarosova, MD, Revmatologicky Ustav, Prague, Czech Republic; J. Anton, MD, PhD, Pediatric Rheumatology Unit, Hospital Sant Joan de Déu, Universitat de Barcelona, Espluges (Barcelona), Spain; M. Macku, MD, Fakultni nemocnice Brno, Bohunice, Detska Nemocnice, Ambulance detske revmatologie detske kliniky, Brno, Czech Republic; W.J. O
authors.forename: Deborah
authors.initials: D
authors.lastname: Woodworth
authors.affiliation: From the Paediatric Rheumatology International Trials Organisation (PRINTO), Istituto G. Gaslini, Pediatria II-Reumatologia, PRINTO, Genoa, Italy.T. Constantin, MD, PhD, 2nd Department of Pediatrics, Semmelweis University, Budapest, Hungary; I. Foeldvari, MD, Hamburg Centre for Child and Adolescent Rheumatology, Hamburg, Germany; J. Vojinovic, MD, PhD, Clinic of Pediatrics, Clinical Centre, Faculty of Medicine, University of Nis, Serbia; G. Horneff, MD, Asklepios Clinic, Sankt Augustin, Germany; R. Burgos-Vargas, MD, Hospital General de Mexico, Mexico City, Mexico; I. Nikishina, MD, V.A. Nasonova Research Institute of Rheumatology, Moscow, Russia; J.D. Akikusa, MD, Royal Children's Hospital Melbourne, Parkville, Victoria, Australia; T. Avcin, MD, PhD, University Medical Centre Ljubljana, Pediatric Clinic, Ljubljana, Slovenia; J. Chaitow, MD, The Sydney Children's Hospital Network, Westmead, Sydney, Australia; E. Koskova, MD, PhD, National Institute of Rheumatic Diseases, Piestany, Slovakia; B.R. Lauwerys, MD, PhD, Institut de Recherche Expérimentale et Clinique, Université catholique de Louvain and Department of Rheumatology, Cliniques Universitaires Saint-Luc, Brussels, Belgium; I. Calvo Penades, MD, PhD, Hospital Universitario y Politécnico La Fe, Pediatric Rheumatology Unit, Valencia, Spain; B. Flato, MD, PhD, Oslo University Hospital, Department of Rheumatology, Oslo, Norway; M.L. Gamir, MD, Hospital Ramon y Cajal Unidad de Reumatologia Pediatrica, Madrid, Spain; H.I. Huppertz, MD, Klinikum Bremen-Mitte, Prof. Hess-Kinderklinik, Bremen, Germany; J.J. Raad, MD, Centro de Reumatologia y Ortopedia, Barranquilla, Atlantico, Colombia; K. Jarosova, MD, Revmatologicky Ustav, Prague, Czech Republic; J. Anton, MD, PhD, Pediatric Rheumatology Unit, Hospital Sant Joan de Déu, Universitat de Barcelona, Espluges (Barcelona), Spain; M. Macku, MD, Fakultni nemocnice Brno, Bohunice, Detska Nemocnice, Ambulance detske revmatologie detske kliniky, Brno, Czech Republic; W.J. O
authors.forename: Bonnie
authors.initials: B
authors.lastname: Vlahos
authors.affiliation: From the Paediatric Rheumatology International Trials Organisation (PRINTO), Istituto G. Gaslini, Pediatria II-Reumatologia, PRINTO, Genoa, Italy.T. Constantin, MD, PhD, 2nd Department of Pediatrics, Semmelweis University, Budapest, Hungary; I. Foeldvari, MD, Hamburg Centre for Child and Adolescent Rheumatology, Hamburg, Germany; J. Vojinovic, MD, PhD, Clinic of Pediatrics, Clinical Centre, Faculty of Medicine, University of Nis, Serbia; G. Horneff, MD, Asklepios Clinic, Sankt Augustin, Germany; R. Burgos-Vargas, MD, Hospital General de Mexico, Mexico City, Mexico; I. Nikishina, MD, V.A. Nasonova Research Institute of Rheumatology, Moscow, Russia; J.D. Akikusa, MD, Royal Children's Hospital Melbourne, Parkville, Victoria, Australia; T. Avcin, MD, PhD, University Medical Centre Ljubljana, Pediatric Clinic, Ljubljana, Slovenia; J. Chaitow, MD, The Sydney Children's Hospital Network, Westmead, Sydney, Australia; E. Koskova, MD, PhD, National Institute of Rheumatic Diseases, Piestany, Slovakia; B.R. Lauwerys, MD, PhD, Institut de Recherche Expérimentale et Clinique, Université catholique de Louvain and Department of Rheumatology, Cliniques Universitaires Saint-Luc, Brussels, Belgium; I. Calvo Penades, MD, PhD, Hospital Universitario y Politécnico La Fe, Pediatric Rheumatology Unit, Valencia, Spain; B. Flato, MD, PhD, Oslo University Hospital, Department of Rheumatology, Oslo, Norway; M.L. Gamir, MD, Hospital Ramon y Cajal Unidad de Reumatologia Pediatrica, Madrid, Spain; H.I. Huppertz, MD, Klinikum Bremen-Mitte, Prof. Hess-Kinderklinik, Bremen, Germany; J.J. Raad, MD, Centro de Reumatologia y Ortopedia, Barranquilla, Atlantico, Colombia; K. Jarosova, MD, Revmatologicky Ustav, Prague, Czech Republic; J. Anton, MD, PhD, Pediatric Rheumatology Unit, Hospital Sant Joan de Déu, Universitat de Barcelona, Espluges (Barcelona), Spain; M. Macku, MD, Fakultni nemocnice Brno, Bohunice, Detska Nemocnice, Ambulance detske revmatologie detske kliniky, Brno, Czech Republic; W.J. O
authors.forename: Alberto
authors.initials: A
authors.lastname: Martini
authors.affiliation: From the Paediatric Rheumatology International Trials Organisation (PRINTO), Istituto G. Gaslini, Pediatria II-Reumatologia, PRINTO, Genoa, Italy.T. Constantin, MD, PhD, 2nd Department of Pediatrics, Semmelweis University, Budapest, Hungary; I. Foeldvari, MD, Hamburg Centre for Child and Adolescent Rheumatology, Hamburg, Germany; J. Vojinovic, MD, PhD, Clinic of Pediatrics, Clinical Centre, Faculty of Medicine, University of Nis, Serbia; G. Horneff, MD, Asklepios Clinic, Sankt Augustin, Germany; R. Burgos-Vargas, MD, Hospital General de Mexico, Mexico City, Mexico; I. Nikishina, MD, V.A. Nasonova Research Institute of Rheumatology, Moscow, Russia; J.D. Akikusa, MD, Royal Children's Hospital Melbourne, Parkville, Victoria, Australia; T. Avcin, MD, PhD, University Medical Centre Ljubljana, Pediatric Clinic, Ljubljana, Slovenia; J. Chaitow, MD, The Sydney Children's Hospital Network, Westmead, Sydney, Australia; E. Koskova, MD, PhD, National Institute of Rheumatic Diseases, Piestany, Slovakia; B.R. Lauwerys, MD, PhD, Institut de Recherche Expérimentale et Clinique, Université catholique de Louvain and Department of Rheumatology, Cliniques Universitaires Saint-Luc, Brussels, Belgium; I. Calvo Penades, MD, PhD, Hospital Universitario y Politécnico La Fe, Pediatric Rheumatology Unit, Valencia, Spain; B. Flato, MD, PhD, Oslo University Hospital, Department of Rheumatology, Oslo, Norway; M.L. Gamir, MD, Hospital Ramon y Cajal Unidad de Reumatologia Pediatrica, Madrid, Spain; H.I. Huppertz, MD, Klinikum Bremen-Mitte, Prof. Hess-Kinderklinik, Bremen, Germany; J.J. Raad, MD, Centro de Reumatologia y Ortopedia, Barranquilla, Atlantico, Colombia; K. Jarosova, MD, Revmatologicky Ustav, Prague, Czech Republic; J. Anton, MD, PhD, Pediatric Rheumatology Unit, Hospital Sant Joan de Déu, Universitat de Barcelona, Espluges (Barcelona), Spain; M. Macku, MD, Fakultni nemocnice Brno, Bohunice, Detska Nemocnice, Ambulance detske revmatologie detske kliniky, Brno, Czech Republic; W.J. O
authors.forename: Nicolino
authors.initials: N
authors.lastname: Ruperto
mesh_terms: D000293:Adolescent; D018501:Antirheumatic Agents / Q000009:adverse effects / Q000627:therapeutic use*; D001171:Arthritis, Juvenile / Q000188:drug therapy*; D015535:Arthritis, Psoriatic / Q000188:drug therapy*; D002648:Child; D002675:Child, Preschool; D000068800:Etanercept / Q000009:adverse effects / Q000627:therapeutic use*; D005260:Female; D006801:Humans; D008297:Male; D016896:Treatment Outcome
chemical_list: D018501:Antirheumatic Agents; D000068800:Etanercept
keywords: CLINICAL TRIAL; ENTHESITIS-RELATED ARTHRITIS; ETANERCEPT; EXTENDED OLIGOARTHRITIS; JUVENILE IDIOPATHIC ARTHRITIS; PSORIATIC ARTHRITIS