title: Five-year follow-up of radiographic sacroiliitis: progression as well as improvement?
authors.affiliation: Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands Department of Rheumatology, Hospital de Egas Moniz-CHLO, Lisbon, Portugal.
authors.forename: Alexandre
authors.initials: A
authors.lastname: Sepriano
authors.affiliation: Klinikum Bielefeld and Charité, Berlin, Germany Gent University, Belgium.
authors.forename: Martin
authors.initials: M
authors.lastname: Rudwaleit
authors.affiliation: Department of Rheumatology, Med Klinik I, Charité Campus Benjamin Franklin, Berlin, Germany German Rheumatism Research Centre, Berlin, Germany.
authors.forename: Joachim
authors.initials: J
authors.lastname: Sieper
authors.affiliation: Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands.
authors.forename: Rosaline
authors.initials: R
authors.lastname: van den Berg
authors.affiliation: Department of Clinical Immunology & Rheumatology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands Rheumatology Department, Atrium Medical Center, Heerlen, The Netherlands.
authors.forename: Robert
authors.initials: R
authors.lastname: Landewé
authors.affiliation: Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands.
authors.forename: Désirée
authors.identifier: 0000-0002-5781-158X
authors.initials: D
authors.lastname: van der Heijde
mesh_terms: D000328:Adult; D018450:Disease Progression; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D012446:Sacroiliac Joint / Q000000981:diagnostic imaging / Q000473:pathology; D058566:Sacroiliitis / Q000000981:diagnostic imaging*; D025241:Spondylarthritis / Q000175:diagnosis*
keywords: Epidemiology; Outcomes research; Spondyloarthritis