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Hebeisen M, Neuenschwander R, Scherer A, Exer P, Weber U, Tamborrini G, Micheroli R, Wildi LM, Zufferey P, Nissen MJ, Villiger PM, Bernhard J, Finckh A, van der Horst-Bruinsma IE, Sieper J, Landewé R, van der Heijde D, Ciurea A. Response to Tumor Necrosis Factor Inhibition in Male and Female Patients with Ankylosing Spondylitis: Data from a Swiss Cohort. J Rheumatol 2018; 45:506-512. [PMID: 29449504 DOI: 10.3899/jrheum.170166] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/06/2017] [Indexed: 01/19/2023]
Abstract
OBJECTIVE To investigate sex differences in connection with the effectiveness of tumor necrosis factor inhibitors (TNFi) in patients with ankylosing spondylitis (AS). METHODS A total of 440 patients with AS (294 men; 146 women) initiating a first TNFi in the prospective Swiss Clinical Quality Management Cohort were included. We evaluated the proportion of patients achieving the 20% and 40% improvement in the Assessment of Spondyloarthritis international Society criteria (ASAS20 and ASAS40) as well as Ankylosing Spondylitis Disease Activity Score (ASDAS) improvement and status scores at 1 year. Patients having discontinued TNFi were considered nonresponders. Logistic regression analyses were performed to adjust for important predictors of response. RESULTS Compared to men, female patients had lower mean C-reactive protein levels, better spinal mobility, and more peripheral disease at the start. There was no sex disparity with regard to the ASDAS, the Bath Ankylosing Spondylitis Disease Activity and Functional indices, and the quality of life. At 1 year, 52% of women and 63% of men achieved an ASAS20 response (OR 0.63, 95% CI 0.37-1.07, p = 0.09). An inactive disease status (ASDAS < 1.3) was reached by 18% of women and 26% of men (OR 0.65, 95% CI 0.32-1.27, p = 0.22). These sex differences in response to TNFi were more pronounced in adjusted analyses (OR 0.34, 95% CI 0.16-0.71, p = 0.005 for ASAS20 and OR 0.10, 95% CI 0.03-0.31, p < 0.001 for ASDAS < 1.3) and confirmed for all the other outcomes assessed. CONCLUSION In AS, fewer women respond to TNFi and women show a reduced response in comparison to men.
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Affiliation(s)
- Monika Hebeisen
- From the Swiss Clinical Quality Management Foundation; Department of Rheumatology, Zurich University Hospital, Zurich; Praxis Rheuma-Basel, Basel, Switzerland; King Christian 10th Hospital for Rheumatic Diseases, Gråsten; Institute of Regional Health Research, University of Southern Denmark, Odense, Denmark; Ultrasound Center Rheumatology, Basel; Department of Rheumatology, Centre Hospitalier Universitaire Vaudois (CHUV), Lausanne; Department of Rheumatology, University Hospital, Geneva; Department of Rheumatology and Clinical Immunology, Inselspital, Bern; Department of Rheumatology and Rehabilitation, Bürgerspital, Solothurn, Switzerland; Department of Rheumatology, VU University Medical Center, Amsterdam, the Netherlands; Department of Gastroenterology, Infectiology and Rheumatology, Charité Universitätsmedizin, Berlin, Germany; Department of Clinical Immunology and Rheumatology, University of Amsterdam; Department of Rheumatology, Zuyderland Hospital, Heerlen; Department of Rheumatology, Leiden University Medical Center, Leiden, the Netherlands.,M. Hebeisen, MSc, Swiss Clinical Quality Management Foundation; R. Neuenschwander, Department of Rheumatology, Zurich University Hospital; A. Scherer, PhD, Swiss Clinical Quality Management Foundation; P. Exer, MD, Praxis Rheuma-Basel; U. Weber, MD, King Christian 10th Hospital for Rheumatic Diseases, Gråsten, and South Jutland Hospital, Institute of Regional Health Research; G. Tamborrini, MD, Ultrasound Center Rheumatology; R. Micheroli, MD, Department of Rheumatology, Zurich University Hospital; L.M. Wildi, MD, Department of Rheumatology, Zurich University Hospital; P. Zufferey, MD, Department of Rheumatology, CHUV; M.J. Nissen, MD, Department of Rheumatology, University Hospital; P.M. Villiger, MD, Department of Rheumatology and Clinical Immunology, Inselspital; J. Bernhard, MD, Department of Rheumatology and Rehabilitation, Bürgerspital; A. Finckh, MD, PhD, Department of Rheumatology, University Hospital; I.E. van der Horst-Bruinsma, MD, PhD, Department of Rheumatology, VU University Medical Center; J. Sieper, MD, Department of Gastroenterology, Infectiology and Rheumatology, Charité Universitätsmedizin; R. Landewé, MD, PhD, Department of Clinical Immunology and Rheumatology, University of Amsterdam, and Department of Rheumatology, Zuyderland Hospital; D. van der Heijde, MD, PhD, Department of Rheumatology, Leiden University Medical Center; A. Ciurea, MD, Department of Rheumatology, Zurich University Hospital
| | - Regula Neuenschwander
- From the Swiss Clinical Quality Management Foundation; Department of Rheumatology, Zurich University Hospital, Zurich; Praxis Rheuma-Basel, Basel, Switzerland; King Christian 10th Hospital for Rheumatic Diseases, Gråsten; Institute of Regional Health Research, University of Southern Denmark, Odense, Denmark; Ultrasound Center Rheumatology, Basel; Department of Rheumatology, Centre Hospitalier Universitaire Vaudois (CHUV), Lausanne; Department of Rheumatology, University Hospital, Geneva; Department of Rheumatology and Clinical Immunology, Inselspital, Bern; Department of Rheumatology and Rehabilitation, Bürgerspital, Solothurn, Switzerland; Department of Rheumatology, VU University Medical Center, Amsterdam, the Netherlands; Department of Gastroenterology, Infectiology and Rheumatology, Charité Universitätsmedizin, Berlin, Germany; Department of Clinical Immunology and Rheumatology, University of Amsterdam; Department of Rheumatology, Zuyderland Hospital, Heerlen; Department of Rheumatology, Leiden University Medical Center, Leiden, the Netherlands.,M. Hebeisen, MSc, Swiss Clinical Quality Management Foundation; R. Neuenschwander, Department of Rheumatology, Zurich University Hospital; A. Scherer, PhD, Swiss Clinical Quality Management Foundation; P. Exer, MD, Praxis Rheuma-Basel; U. Weber, MD, King Christian 10th Hospital for Rheumatic Diseases, Gråsten, and South Jutland Hospital, Institute of Regional Health Research; G. Tamborrini, MD, Ultrasound Center Rheumatology; R. Micheroli, MD, Department of Rheumatology, Zurich University Hospital; L.M. Wildi, MD, Department of Rheumatology, Zurich University Hospital; P. Zufferey, MD, Department of Rheumatology, CHUV; M.J. Nissen, MD, Department of Rheumatology, University Hospital; P.M. Villiger, MD, Department of Rheumatology and Clinical Immunology, Inselspital; J. Bernhard, MD, Department of Rheumatology and Rehabilitation, Bürgerspital; A. Finckh, MD, PhD, Department of Rheumatology, University Hospital; I.E. van der Horst-Bruinsma, MD, PhD, Department of Rheumatology, VU University Medical Center; J. Sieper, MD, Department of Gastroenterology, Infectiology and Rheumatology, Charité Universitätsmedizin; R. Landewé, MD, PhD, Department of Clinical Immunology and Rheumatology, University of Amsterdam, and Department of Rheumatology, Zuyderland Hospital; D. van der Heijde, MD, PhD, Department of Rheumatology, Leiden University Medical Center; A. Ciurea, MD, Department of Rheumatology, Zurich University Hospital
| | - Almut Scherer
- From the Swiss Clinical Quality Management Foundation; Department of Rheumatology, Zurich University Hospital, Zurich; Praxis Rheuma-Basel, Basel, Switzerland; King Christian 10th Hospital for Rheumatic Diseases, Gråsten; Institute of Regional Health Research, University of Southern Denmark, Odense, Denmark; Ultrasound Center Rheumatology, Basel; Department of Rheumatology, Centre Hospitalier Universitaire Vaudois (CHUV), Lausanne; Department of Rheumatology, University Hospital, Geneva; Department of Rheumatology and Clinical Immunology, Inselspital, Bern; Department of Rheumatology and Rehabilitation, Bürgerspital, Solothurn, Switzerland; Department of Rheumatology, VU University Medical Center, Amsterdam, the Netherlands; Department of Gastroenterology, Infectiology and Rheumatology, Charité Universitätsmedizin, Berlin, Germany; Department of Clinical Immunology and Rheumatology, University of Amsterdam; Department of Rheumatology, Zuyderland Hospital, Heerlen; Department of Rheumatology, Leiden University Medical Center, Leiden, the Netherlands.,M. Hebeisen, MSc, Swiss Clinical Quality Management Foundation; R. Neuenschwander, Department of Rheumatology, Zurich University Hospital; A. Scherer, PhD, Swiss Clinical Quality Management Foundation; P. Exer, MD, Praxis Rheuma-Basel; U. Weber, MD, King Christian 10th Hospital for Rheumatic Diseases, Gråsten, and South Jutland Hospital, Institute of Regional Health Research; G. Tamborrini, MD, Ultrasound Center Rheumatology; R. Micheroli, MD, Department of Rheumatology, Zurich University Hospital; L.M. Wildi, MD, Department of Rheumatology, Zurich University Hospital; P. Zufferey, MD, Department of Rheumatology, CHUV; M.J. Nissen, MD, Department of Rheumatology, University Hospital; P.M. Villiger, MD, Department of Rheumatology and Clinical Immunology, Inselspital; J. Bernhard, MD, Department of Rheumatology and Rehabilitation, Bürgerspital; A. Finckh, MD, PhD, Department of Rheumatology, University Hospital; I.E. van der Horst-Bruinsma, MD, PhD, Department of Rheumatology, VU University Medical Center; J. Sieper, MD, Department of Gastroenterology, Infectiology and Rheumatology, Charité Universitätsmedizin; R. Landewé, MD, PhD, Department of Clinical Immunology and Rheumatology, University of Amsterdam, and Department of Rheumatology, Zuyderland Hospital; D. van der Heijde, MD, PhD, Department of Rheumatology, Leiden University Medical Center; A. Ciurea, MD, Department of Rheumatology, Zurich University Hospital
| | - Pascale Exer
- From the Swiss Clinical Quality Management Foundation; Department of Rheumatology, Zurich University Hospital, Zurich; Praxis Rheuma-Basel, Basel, Switzerland; King Christian 10th Hospital for Rheumatic Diseases, Gråsten; Institute of Regional Health Research, University of Southern Denmark, Odense, Denmark; Ultrasound Center Rheumatology, Basel; Department of Rheumatology, Centre Hospitalier Universitaire Vaudois (CHUV), Lausanne; Department of Rheumatology, University Hospital, Geneva; Department of Rheumatology and Clinical Immunology, Inselspital, Bern; Department of Rheumatology and Rehabilitation, Bürgerspital, Solothurn, Switzerland; Department of Rheumatology, VU University Medical Center, Amsterdam, the Netherlands; Department of Gastroenterology, Infectiology and Rheumatology, Charité Universitätsmedizin, Berlin, Germany; Department of Clinical Immunology and Rheumatology, University of Amsterdam; Department of Rheumatology, Zuyderland Hospital, Heerlen; Department of Rheumatology, Leiden University Medical Center, Leiden, the Netherlands.,M. Hebeisen, MSc, Swiss Clinical Quality Management Foundation; R. Neuenschwander, Department of Rheumatology, Zurich University Hospital; A. Scherer, PhD, Swiss Clinical Quality Management Foundation; P. Exer, MD, Praxis Rheuma-Basel; U. Weber, MD, King Christian 10th Hospital for Rheumatic Diseases, Gråsten, and South Jutland Hospital, Institute of Regional Health Research; G. Tamborrini, MD, Ultrasound Center Rheumatology; R. Micheroli, MD, Department of Rheumatology, Zurich University Hospital; L.M. Wildi, MD, Department of Rheumatology, Zurich University Hospital; P. Zufferey, MD, Department of Rheumatology, CHUV; M.J. Nissen, MD, Department of Rheumatology, University Hospital; P.M. Villiger, MD, Department of Rheumatology and Clinical Immunology, Inselspital; J. Bernhard, MD, Department of Rheumatology and Rehabilitation, Bürgerspital; A. Finckh, MD, PhD, Department of Rheumatology, University Hospital; I.E. van der Horst-Bruinsma, MD, PhD, Department of Rheumatology, VU University Medical Center; J. Sieper, MD, Department of Gastroenterology, Infectiology and Rheumatology, Charité Universitätsmedizin; R. Landewé, MD, PhD, Department of Clinical Immunology and Rheumatology, University of Amsterdam, and Department of Rheumatology, Zuyderland Hospital; D. van der Heijde, MD, PhD, Department of Rheumatology, Leiden University Medical Center; A. Ciurea, MD, Department of Rheumatology, Zurich University Hospital
| | - Ulrich Weber
- From the Swiss Clinical Quality Management Foundation; Department of Rheumatology, Zurich University Hospital, Zurich; Praxis Rheuma-Basel, Basel, Switzerland; King Christian 10th Hospital for Rheumatic Diseases, Gråsten; Institute of Regional Health Research, University of Southern Denmark, Odense, Denmark; Ultrasound Center Rheumatology, Basel; Department of Rheumatology, Centre Hospitalier Universitaire Vaudois (CHUV), Lausanne; Department of Rheumatology, University Hospital, Geneva; Department of Rheumatology and Clinical Immunology, Inselspital, Bern; Department of Rheumatology and Rehabilitation, Bürgerspital, Solothurn, Switzerland; Department of Rheumatology, VU University Medical Center, Amsterdam, the Netherlands; Department of Gastroenterology, Infectiology and Rheumatology, Charité Universitätsmedizin, Berlin, Germany; Department of Clinical Immunology and Rheumatology, University of Amsterdam; Department of Rheumatology, Zuyderland Hospital, Heerlen; Department of Rheumatology, Leiden University Medical Center, Leiden, the Netherlands.,M. Hebeisen, MSc, Swiss Clinical Quality Management Foundation; R. Neuenschwander, Department of Rheumatology, Zurich University Hospital; A. Scherer, PhD, Swiss Clinical Quality Management Foundation; P. Exer, MD, Praxis Rheuma-Basel; U. Weber, MD, King Christian 10th Hospital for Rheumatic Diseases, Gråsten, and South Jutland Hospital, Institute of Regional Health Research; G. Tamborrini, MD, Ultrasound Center Rheumatology; R. Micheroli, MD, Department of Rheumatology, Zurich University Hospital; L.M. Wildi, MD, Department of Rheumatology, Zurich University Hospital; P. Zufferey, MD, Department of Rheumatology, CHUV; M.J. Nissen, MD, Department of Rheumatology, University Hospital; P.M. Villiger, MD, Department of Rheumatology and Clinical Immunology, Inselspital; J. Bernhard, MD, Department of Rheumatology and Rehabilitation, Bürgerspital; A. Finckh, MD, PhD, Department of Rheumatology, University Hospital; I.E. van der Horst-Bruinsma, MD, PhD, Department of Rheumatology, VU University Medical Center; J. Sieper, MD, Department of Gastroenterology, Infectiology and Rheumatology, Charité Universitätsmedizin; R. Landewé, MD, PhD, Department of Clinical Immunology and Rheumatology, University of Amsterdam, and Department of Rheumatology, Zuyderland Hospital; D. van der Heijde, MD, PhD, Department of Rheumatology, Leiden University Medical Center; A. Ciurea, MD, Department of Rheumatology, Zurich University Hospital
| | - Giorgio Tamborrini
- From the Swiss Clinical Quality Management Foundation; Department of Rheumatology, Zurich University Hospital, Zurich; Praxis Rheuma-Basel, Basel, Switzerland; King Christian 10th Hospital for Rheumatic Diseases, Gråsten; Institute of Regional Health Research, University of Southern Denmark, Odense, Denmark; Ultrasound Center Rheumatology, Basel; Department of Rheumatology, Centre Hospitalier Universitaire Vaudois (CHUV), Lausanne; Department of Rheumatology, University Hospital, Geneva; Department of Rheumatology and Clinical Immunology, Inselspital, Bern; Department of Rheumatology and Rehabilitation, Bürgerspital, Solothurn, Switzerland; Department of Rheumatology, VU University Medical Center, Amsterdam, the Netherlands; Department of Gastroenterology, Infectiology and Rheumatology, Charité Universitätsmedizin, Berlin, Germany; Department of Clinical Immunology and Rheumatology, University of Amsterdam; Department of Rheumatology, Zuyderland Hospital, Heerlen; Department of Rheumatology, Leiden University Medical Center, Leiden, the Netherlands.,M. Hebeisen, MSc, Swiss Clinical Quality Management Foundation; R. Neuenschwander, Department of Rheumatology, Zurich University Hospital; A. Scherer, PhD, Swiss Clinical Quality Management Foundation; P. Exer, MD, Praxis Rheuma-Basel; U. Weber, MD, King Christian 10th Hospital for Rheumatic Diseases, Gråsten, and South Jutland Hospital, Institute of Regional Health Research; G. Tamborrini, MD, Ultrasound Center Rheumatology; R. Micheroli, MD, Department of Rheumatology, Zurich University Hospital; L.M. Wildi, MD, Department of Rheumatology, Zurich University Hospital; P. Zufferey, MD, Department of Rheumatology, CHUV; M.J. Nissen, MD, Department of Rheumatology, University Hospital; P.M. Villiger, MD, Department of Rheumatology and Clinical Immunology, Inselspital; J. Bernhard, MD, Department of Rheumatology and Rehabilitation, Bürgerspital; A. Finckh, MD, PhD, Department of Rheumatology, University Hospital; I.E. van der Horst-Bruinsma, MD, PhD, Department of Rheumatology, VU University Medical Center; J. Sieper, MD, Department of Gastroenterology, Infectiology and Rheumatology, Charité Universitätsmedizin; R. Landewé, MD, PhD, Department of Clinical Immunology and Rheumatology, University of Amsterdam, and Department of Rheumatology, Zuyderland Hospital; D. van der Heijde, MD, PhD, Department of Rheumatology, Leiden University Medical Center; A. Ciurea, MD, Department of Rheumatology, Zurich University Hospital
| | - Raphael Micheroli
- From the Swiss Clinical Quality Management Foundation; Department of Rheumatology, Zurich University Hospital, Zurich; Praxis Rheuma-Basel, Basel, Switzerland; King Christian 10th Hospital for Rheumatic Diseases, Gråsten; Institute of Regional Health Research, University of Southern Denmark, Odense, Denmark; Ultrasound Center Rheumatology, Basel; Department of Rheumatology, Centre Hospitalier Universitaire Vaudois (CHUV), Lausanne; Department of Rheumatology, University Hospital, Geneva; Department of Rheumatology and Clinical Immunology, Inselspital, Bern; Department of Rheumatology and Rehabilitation, Bürgerspital, Solothurn, Switzerland; Department of Rheumatology, VU University Medical Center, Amsterdam, the Netherlands; Department of Gastroenterology, Infectiology and Rheumatology, Charité Universitätsmedizin, Berlin, Germany; Department of Clinical Immunology and Rheumatology, University of Amsterdam; Department of Rheumatology, Zuyderland Hospital, Heerlen; Department of Rheumatology, Leiden University Medical Center, Leiden, the Netherlands.,M. Hebeisen, MSc, Swiss Clinical Quality Management Foundation; R. Neuenschwander, Department of Rheumatology, Zurich University Hospital; A. Scherer, PhD, Swiss Clinical Quality Management Foundation; P. Exer, MD, Praxis Rheuma-Basel; U. Weber, MD, King Christian 10th Hospital for Rheumatic Diseases, Gråsten, and South Jutland Hospital, Institute of Regional Health Research; G. Tamborrini, MD, Ultrasound Center Rheumatology; R. Micheroli, MD, Department of Rheumatology, Zurich University Hospital; L.M. Wildi, MD, Department of Rheumatology, Zurich University Hospital; P. Zufferey, MD, Department of Rheumatology, CHUV; M.J. Nissen, MD, Department of Rheumatology, University Hospital; P.M. Villiger, MD, Department of Rheumatology and Clinical Immunology, Inselspital; J. Bernhard, MD, Department of Rheumatology and Rehabilitation, Bürgerspital; A. Finckh, MD, PhD, Department of Rheumatology, University Hospital; I.E. van der Horst-Bruinsma, MD, PhD, Department of Rheumatology, VU University Medical Center; J. Sieper, MD, Department of Gastroenterology, Infectiology and Rheumatology, Charité Universitätsmedizin; R. Landewé, MD, PhD, Department of Clinical Immunology and Rheumatology, University of Amsterdam, and Department of Rheumatology, Zuyderland Hospital; D. van der Heijde, MD, PhD, Department of Rheumatology, Leiden University Medical Center; A. Ciurea, MD, Department of Rheumatology, Zurich University Hospital
| | - Lukas M Wildi
- From the Swiss Clinical Quality Management Foundation; Department of Rheumatology, Zurich University Hospital, Zurich; Praxis Rheuma-Basel, Basel, Switzerland; King Christian 10th Hospital for Rheumatic Diseases, Gråsten; Institute of Regional Health Research, University of Southern Denmark, Odense, Denmark; Ultrasound Center Rheumatology, Basel; Department of Rheumatology, Centre Hospitalier Universitaire Vaudois (CHUV), Lausanne; Department of Rheumatology, University Hospital, Geneva; Department of Rheumatology and Clinical Immunology, Inselspital, Bern; Department of Rheumatology and Rehabilitation, Bürgerspital, Solothurn, Switzerland; Department of Rheumatology, VU University Medical Center, Amsterdam, the Netherlands; Department of Gastroenterology, Infectiology and Rheumatology, Charité Universitätsmedizin, Berlin, Germany; Department of Clinical Immunology and Rheumatology, University of Amsterdam; Department of Rheumatology, Zuyderland Hospital, Heerlen; Department of Rheumatology, Leiden University Medical Center, Leiden, the Netherlands.,M. Hebeisen, MSc, Swiss Clinical Quality Management Foundation; R. Neuenschwander, Department of Rheumatology, Zurich University Hospital; A. Scherer, PhD, Swiss Clinical Quality Management Foundation; P. Exer, MD, Praxis Rheuma-Basel; U. Weber, MD, King Christian 10th Hospital for Rheumatic Diseases, Gråsten, and South Jutland Hospital, Institute of Regional Health Research; G. Tamborrini, MD, Ultrasound Center Rheumatology; R. Micheroli, MD, Department of Rheumatology, Zurich University Hospital; L.M. Wildi, MD, Department of Rheumatology, Zurich University Hospital; P. Zufferey, MD, Department of Rheumatology, CHUV; M.J. Nissen, MD, Department of Rheumatology, University Hospital; P.M. Villiger, MD, Department of Rheumatology and Clinical Immunology, Inselspital; J. Bernhard, MD, Department of Rheumatology and Rehabilitation, Bürgerspital; A. Finckh, MD, PhD, Department of Rheumatology, University Hospital; I.E. van der Horst-Bruinsma, MD, PhD, Department of Rheumatology, VU University Medical Center; J. Sieper, MD, Department of Gastroenterology, Infectiology and Rheumatology, Charité Universitätsmedizin; R. Landewé, MD, PhD, Department of Clinical Immunology and Rheumatology, University of Amsterdam, and Department of Rheumatology, Zuyderland Hospital; D. van der Heijde, MD, PhD, Department of Rheumatology, Leiden University Medical Center; A. Ciurea, MD, Department of Rheumatology, Zurich University Hospital
| | - Pascal Zufferey
- From the Swiss Clinical Quality Management Foundation; Department of Rheumatology, Zurich University Hospital, Zurich; Praxis Rheuma-Basel, Basel, Switzerland; King Christian 10th Hospital for Rheumatic Diseases, Gråsten; Institute of Regional Health Research, University of Southern Denmark, Odense, Denmark; Ultrasound Center Rheumatology, Basel; Department of Rheumatology, Centre Hospitalier Universitaire Vaudois (CHUV), Lausanne; Department of Rheumatology, University Hospital, Geneva; Department of Rheumatology and Clinical Immunology, Inselspital, Bern; Department of Rheumatology and Rehabilitation, Bürgerspital, Solothurn, Switzerland; Department of Rheumatology, VU University Medical Center, Amsterdam, the Netherlands; Department of Gastroenterology, Infectiology and Rheumatology, Charité Universitätsmedizin, Berlin, Germany; Department of Clinical Immunology and Rheumatology, University of Amsterdam; Department of Rheumatology, Zuyderland Hospital, Heerlen; Department of Rheumatology, Leiden University Medical Center, Leiden, the Netherlands.,M. Hebeisen, MSc, Swiss Clinical Quality Management Foundation; R. Neuenschwander, Department of Rheumatology, Zurich University Hospital; A. Scherer, PhD, Swiss Clinical Quality Management Foundation; P. Exer, MD, Praxis Rheuma-Basel; U. Weber, MD, King Christian 10th Hospital for Rheumatic Diseases, Gråsten, and South Jutland Hospital, Institute of Regional Health Research; G. Tamborrini, MD, Ultrasound Center Rheumatology; R. Micheroli, MD, Department of Rheumatology, Zurich University Hospital; L.M. Wildi, MD, Department of Rheumatology, Zurich University Hospital; P. Zufferey, MD, Department of Rheumatology, CHUV; M.J. Nissen, MD, Department of Rheumatology, University Hospital; P.M. Villiger, MD, Department of Rheumatology and Clinical Immunology, Inselspital; J. Bernhard, MD, Department of Rheumatology and Rehabilitation, Bürgerspital; A. Finckh, MD, PhD, Department of Rheumatology, University Hospital; I.E. van der Horst-Bruinsma, MD, PhD, Department of Rheumatology, VU University Medical Center; J. Sieper, MD, Department of Gastroenterology, Infectiology and Rheumatology, Charité Universitätsmedizin; R. Landewé, MD, PhD, Department of Clinical Immunology and Rheumatology, University of Amsterdam, and Department of Rheumatology, Zuyderland Hospital; D. van der Heijde, MD, PhD, Department of Rheumatology, Leiden University Medical Center; A. Ciurea, MD, Department of Rheumatology, Zurich University Hospital
| | - Michael J Nissen
- From the Swiss Clinical Quality Management Foundation; Department of Rheumatology, Zurich University Hospital, Zurich; Praxis Rheuma-Basel, Basel, Switzerland; King Christian 10th Hospital for Rheumatic Diseases, Gråsten; Institute of Regional Health Research, University of Southern Denmark, Odense, Denmark; Ultrasound Center Rheumatology, Basel; Department of Rheumatology, Centre Hospitalier Universitaire Vaudois (CHUV), Lausanne; Department of Rheumatology, University Hospital, Geneva; Department of Rheumatology and Clinical Immunology, Inselspital, Bern; Department of Rheumatology and Rehabilitation, Bürgerspital, Solothurn, Switzerland; Department of Rheumatology, VU University Medical Center, Amsterdam, the Netherlands; Department of Gastroenterology, Infectiology and Rheumatology, Charité Universitätsmedizin, Berlin, Germany; Department of Clinical Immunology and Rheumatology, University of Amsterdam; Department of Rheumatology, Zuyderland Hospital, Heerlen; Department of Rheumatology, Leiden University Medical Center, Leiden, the Netherlands.,M. Hebeisen, MSc, Swiss Clinical Quality Management Foundation; R. Neuenschwander, Department of Rheumatology, Zurich University Hospital; A. Scherer, PhD, Swiss Clinical Quality Management Foundation; P. Exer, MD, Praxis Rheuma-Basel; U. Weber, MD, King Christian 10th Hospital for Rheumatic Diseases, Gråsten, and South Jutland Hospital, Institute of Regional Health Research; G. Tamborrini, MD, Ultrasound Center Rheumatology; R. Micheroli, MD, Department of Rheumatology, Zurich University Hospital; L.M. Wildi, MD, Department of Rheumatology, Zurich University Hospital; P. Zufferey, MD, Department of Rheumatology, CHUV; M.J. Nissen, MD, Department of Rheumatology, University Hospital; P.M. Villiger, MD, Department of Rheumatology and Clinical Immunology, Inselspital; J. Bernhard, MD, Department of Rheumatology and Rehabilitation, Bürgerspital; A. Finckh, MD, PhD, Department of Rheumatology, University Hospital; I.E. van der Horst-Bruinsma, MD, PhD, Department of Rheumatology, VU University Medical Center; J. Sieper, MD, Department of Gastroenterology, Infectiology and Rheumatology, Charité Universitätsmedizin; R. Landewé, MD, PhD, Department of Clinical Immunology and Rheumatology, University of Amsterdam, and Department of Rheumatology, Zuyderland Hospital; D. van der Heijde, MD, PhD, Department of Rheumatology, Leiden University Medical Center; A. Ciurea, MD, Department of Rheumatology, Zurich University Hospital
| | - Peter M Villiger
- From the Swiss Clinical Quality Management Foundation; Department of Rheumatology, Zurich University Hospital, Zurich; Praxis Rheuma-Basel, Basel, Switzerland; King Christian 10th Hospital for Rheumatic Diseases, Gråsten; Institute of Regional Health Research, University of Southern Denmark, Odense, Denmark; Ultrasound Center Rheumatology, Basel; Department of Rheumatology, Centre Hospitalier Universitaire Vaudois (CHUV), Lausanne; Department of Rheumatology, University Hospital, Geneva; Department of Rheumatology and Clinical Immunology, Inselspital, Bern; Department of Rheumatology and Rehabilitation, Bürgerspital, Solothurn, Switzerland; Department of Rheumatology, VU University Medical Center, Amsterdam, the Netherlands; Department of Gastroenterology, Infectiology and Rheumatology, Charité Universitätsmedizin, Berlin, Germany; Department of Clinical Immunology and Rheumatology, University of Amsterdam; Department of Rheumatology, Zuyderland Hospital, Heerlen; Department of Rheumatology, Leiden University Medical Center, Leiden, the Netherlands.,M. Hebeisen, MSc, Swiss Clinical Quality Management Foundation; R. Neuenschwander, Department of Rheumatology, Zurich University Hospital; A. Scherer, PhD, Swiss Clinical Quality Management Foundation; P. Exer, MD, Praxis Rheuma-Basel; U. Weber, MD, King Christian 10th Hospital for Rheumatic Diseases, Gråsten, and South Jutland Hospital, Institute of Regional Health Research; G. Tamborrini, MD, Ultrasound Center Rheumatology; R. Micheroli, MD, Department of Rheumatology, Zurich University Hospital; L.M. Wildi, MD, Department of Rheumatology, Zurich University Hospital; P. Zufferey, MD, Department of Rheumatology, CHUV; M.J. Nissen, MD, Department of Rheumatology, University Hospital; P.M. Villiger, MD, Department of Rheumatology and Clinical Immunology, Inselspital; J. Bernhard, MD, Department of Rheumatology and Rehabilitation, Bürgerspital; A. Finckh, MD, PhD, Department of Rheumatology, University Hospital; I.E. van der Horst-Bruinsma, MD, PhD, Department of Rheumatology, VU University Medical Center; J. Sieper, MD, Department of Gastroenterology, Infectiology and Rheumatology, Charité Universitätsmedizin; R. Landewé, MD, PhD, Department of Clinical Immunology and Rheumatology, University of Amsterdam, and Department of Rheumatology, Zuyderland Hospital; D. van der Heijde, MD, PhD, Department of Rheumatology, Leiden University Medical Center; A. Ciurea, MD, Department of Rheumatology, Zurich University Hospital
| | - Jürg Bernhard
- From the Swiss Clinical Quality Management Foundation; Department of Rheumatology, Zurich University Hospital, Zurich; Praxis Rheuma-Basel, Basel, Switzerland; King Christian 10th Hospital for Rheumatic Diseases, Gråsten; Institute of Regional Health Research, University of Southern Denmark, Odense, Denmark; Ultrasound Center Rheumatology, Basel; Department of Rheumatology, Centre Hospitalier Universitaire Vaudois (CHUV), Lausanne; Department of Rheumatology, University Hospital, Geneva; Department of Rheumatology and Clinical Immunology, Inselspital, Bern; Department of Rheumatology and Rehabilitation, Bürgerspital, Solothurn, Switzerland; Department of Rheumatology, VU University Medical Center, Amsterdam, the Netherlands; Department of Gastroenterology, Infectiology and Rheumatology, Charité Universitätsmedizin, Berlin, Germany; Department of Clinical Immunology and Rheumatology, University of Amsterdam; Department of Rheumatology, Zuyderland Hospital, Heerlen; Department of Rheumatology, Leiden University Medical Center, Leiden, the Netherlands.,M. Hebeisen, MSc, Swiss Clinical Quality Management Foundation; R. Neuenschwander, Department of Rheumatology, Zurich University Hospital; A. Scherer, PhD, Swiss Clinical Quality Management Foundation; P. Exer, MD, Praxis Rheuma-Basel; U. Weber, MD, King Christian 10th Hospital for Rheumatic Diseases, Gråsten, and South Jutland Hospital, Institute of Regional Health Research; G. Tamborrini, MD, Ultrasound Center Rheumatology; R. Micheroli, MD, Department of Rheumatology, Zurich University Hospital; L.M. Wildi, MD, Department of Rheumatology, Zurich University Hospital; P. Zufferey, MD, Department of Rheumatology, CHUV; M.J. Nissen, MD, Department of Rheumatology, University Hospital; P.M. Villiger, MD, Department of Rheumatology and Clinical Immunology, Inselspital; J. Bernhard, MD, Department of Rheumatology and Rehabilitation, Bürgerspital; A. Finckh, MD, PhD, Department of Rheumatology, University Hospital; I.E. van der Horst-Bruinsma, MD, PhD, Department of Rheumatology, VU University Medical Center; J. Sieper, MD, Department of Gastroenterology, Infectiology and Rheumatology, Charité Universitätsmedizin; R. Landewé, MD, PhD, Department of Clinical Immunology and Rheumatology, University of Amsterdam, and Department of Rheumatology, Zuyderland Hospital; D. van der Heijde, MD, PhD, Department of Rheumatology, Leiden University Medical Center; A. Ciurea, MD, Department of Rheumatology, Zurich University Hospital
| | - Axel Finckh
- From the Swiss Clinical Quality Management Foundation; Department of Rheumatology, Zurich University Hospital, Zurich; Praxis Rheuma-Basel, Basel, Switzerland; King Christian 10th Hospital for Rheumatic Diseases, Gråsten; Institute of Regional Health Research, University of Southern Denmark, Odense, Denmark; Ultrasound Center Rheumatology, Basel; Department of Rheumatology, Centre Hospitalier Universitaire Vaudois (CHUV), Lausanne; Department of Rheumatology, University Hospital, Geneva; Department of Rheumatology and Clinical Immunology, Inselspital, Bern; Department of Rheumatology and Rehabilitation, Bürgerspital, Solothurn, Switzerland; Department of Rheumatology, VU University Medical Center, Amsterdam, the Netherlands; Department of Gastroenterology, Infectiology and Rheumatology, Charité Universitätsmedizin, Berlin, Germany; Department of Clinical Immunology and Rheumatology, University of Amsterdam; Department of Rheumatology, Zuyderland Hospital, Heerlen; Department of Rheumatology, Leiden University Medical Center, Leiden, the Netherlands.,M. Hebeisen, MSc, Swiss Clinical Quality Management Foundation; R. Neuenschwander, Department of Rheumatology, Zurich University Hospital; A. Scherer, PhD, Swiss Clinical Quality Management Foundation; P. Exer, MD, Praxis Rheuma-Basel; U. Weber, MD, King Christian 10th Hospital for Rheumatic Diseases, Gråsten, and South Jutland Hospital, Institute of Regional Health Research; G. Tamborrini, MD, Ultrasound Center Rheumatology; R. Micheroli, MD, Department of Rheumatology, Zurich University Hospital; L.M. Wildi, MD, Department of Rheumatology, Zurich University Hospital; P. Zufferey, MD, Department of Rheumatology, CHUV; M.J. Nissen, MD, Department of Rheumatology, University Hospital; P.M. Villiger, MD, Department of Rheumatology and Clinical Immunology, Inselspital; J. Bernhard, MD, Department of Rheumatology and Rehabilitation, Bürgerspital; A. Finckh, MD, PhD, Department of Rheumatology, University Hospital; I.E. van der Horst-Bruinsma, MD, PhD, Department of Rheumatology, VU University Medical Center; J. Sieper, MD, Department of Gastroenterology, Infectiology and Rheumatology, Charité Universitätsmedizin; R. Landewé, MD, PhD, Department of Clinical Immunology and Rheumatology, University of Amsterdam, and Department of Rheumatology, Zuyderland Hospital; D. van der Heijde, MD, PhD, Department of Rheumatology, Leiden University Medical Center; A. Ciurea, MD, Department of Rheumatology, Zurich University Hospital
| | - Irene E van der Horst-Bruinsma
- From the Swiss Clinical Quality Management Foundation; Department of Rheumatology, Zurich University Hospital, Zurich; Praxis Rheuma-Basel, Basel, Switzerland; King Christian 10th Hospital for Rheumatic Diseases, Gråsten; Institute of Regional Health Research, University of Southern Denmark, Odense, Denmark; Ultrasound Center Rheumatology, Basel; Department of Rheumatology, Centre Hospitalier Universitaire Vaudois (CHUV), Lausanne; Department of Rheumatology, University Hospital, Geneva; Department of Rheumatology and Clinical Immunology, Inselspital, Bern; Department of Rheumatology and Rehabilitation, Bürgerspital, Solothurn, Switzerland; Department of Rheumatology, VU University Medical Center, Amsterdam, the Netherlands; Department of Gastroenterology, Infectiology and Rheumatology, Charité Universitätsmedizin, Berlin, Germany; Department of Clinical Immunology and Rheumatology, University of Amsterdam; Department of Rheumatology, Zuyderland Hospital, Heerlen; Department of Rheumatology, Leiden University Medical Center, Leiden, the Netherlands.,M. Hebeisen, MSc, Swiss Clinical Quality Management Foundation; R. Neuenschwander, Department of Rheumatology, Zurich University Hospital; A. Scherer, PhD, Swiss Clinical Quality Management Foundation; P. Exer, MD, Praxis Rheuma-Basel; U. Weber, MD, King Christian 10th Hospital for Rheumatic Diseases, Gråsten, and South Jutland Hospital, Institute of Regional Health Research; G. Tamborrini, MD, Ultrasound Center Rheumatology; R. Micheroli, MD, Department of Rheumatology, Zurich University Hospital; L.M. Wildi, MD, Department of Rheumatology, Zurich University Hospital; P. Zufferey, MD, Department of Rheumatology, CHUV; M.J. Nissen, MD, Department of Rheumatology, University Hospital; P.M. Villiger, MD, Department of Rheumatology and Clinical Immunology, Inselspital; J. Bernhard, MD, Department of Rheumatology and Rehabilitation, Bürgerspital; A. Finckh, MD, PhD, Department of Rheumatology, University Hospital; I.E. van der Horst-Bruinsma, MD, PhD, Department of Rheumatology, VU University Medical Center; J. Sieper, MD, Department of Gastroenterology, Infectiology and Rheumatology, Charité Universitätsmedizin; R. Landewé, MD, PhD, Department of Clinical Immunology and Rheumatology, University of Amsterdam, and Department of Rheumatology, Zuyderland Hospital; D. van der Heijde, MD, PhD, Department of Rheumatology, Leiden University Medical Center; A. Ciurea, MD, Department of Rheumatology, Zurich University Hospital
| | - Joachim Sieper
- From the Swiss Clinical Quality Management Foundation; Department of Rheumatology, Zurich University Hospital, Zurich; Praxis Rheuma-Basel, Basel, Switzerland; King Christian 10th Hospital for Rheumatic Diseases, Gråsten; Institute of Regional Health Research, University of Southern Denmark, Odense, Denmark; Ultrasound Center Rheumatology, Basel; Department of Rheumatology, Centre Hospitalier Universitaire Vaudois (CHUV), Lausanne; Department of Rheumatology, University Hospital, Geneva; Department of Rheumatology and Clinical Immunology, Inselspital, Bern; Department of Rheumatology and Rehabilitation, Bürgerspital, Solothurn, Switzerland; Department of Rheumatology, VU University Medical Center, Amsterdam, the Netherlands; Department of Gastroenterology, Infectiology and Rheumatology, Charité Universitätsmedizin, Berlin, Germany; Department of Clinical Immunology and Rheumatology, University of Amsterdam; Department of Rheumatology, Zuyderland Hospital, Heerlen; Department of Rheumatology, Leiden University Medical Center, Leiden, the Netherlands.,M. Hebeisen, MSc, Swiss Clinical Quality Management Foundation; R. Neuenschwander, Department of Rheumatology, Zurich University Hospital; A. Scherer, PhD, Swiss Clinical Quality Management Foundation; P. Exer, MD, Praxis Rheuma-Basel; U. Weber, MD, King Christian 10th Hospital for Rheumatic Diseases, Gråsten, and South Jutland Hospital, Institute of Regional Health Research; G. Tamborrini, MD, Ultrasound Center Rheumatology; R. Micheroli, MD, Department of Rheumatology, Zurich University Hospital; L.M. Wildi, MD, Department of Rheumatology, Zurich University Hospital; P. Zufferey, MD, Department of Rheumatology, CHUV; M.J. Nissen, MD, Department of Rheumatology, University Hospital; P.M. Villiger, MD, Department of Rheumatology and Clinical Immunology, Inselspital; J. Bernhard, MD, Department of Rheumatology and Rehabilitation, Bürgerspital; A. Finckh, MD, PhD, Department of Rheumatology, University Hospital; I.E. van der Horst-Bruinsma, MD, PhD, Department of Rheumatology, VU University Medical Center; J. Sieper, MD, Department of Gastroenterology, Infectiology and Rheumatology, Charité Universitätsmedizin; R. Landewé, MD, PhD, Department of Clinical Immunology and Rheumatology, University of Amsterdam, and Department of Rheumatology, Zuyderland Hospital; D. van der Heijde, MD, PhD, Department of Rheumatology, Leiden University Medical Center; A. Ciurea, MD, Department of Rheumatology, Zurich University Hospital
| | - Robert Landewé
- From the Swiss Clinical Quality Management Foundation; Department of Rheumatology, Zurich University Hospital, Zurich; Praxis Rheuma-Basel, Basel, Switzerland; King Christian 10th Hospital for Rheumatic Diseases, Gråsten; Institute of Regional Health Research, University of Southern Denmark, Odense, Denmark; Ultrasound Center Rheumatology, Basel; Department of Rheumatology, Centre Hospitalier Universitaire Vaudois (CHUV), Lausanne; Department of Rheumatology, University Hospital, Geneva; Department of Rheumatology and Clinical Immunology, Inselspital, Bern; Department of Rheumatology and Rehabilitation, Bürgerspital, Solothurn, Switzerland; Department of Rheumatology, VU University Medical Center, Amsterdam, the Netherlands; Department of Gastroenterology, Infectiology and Rheumatology, Charité Universitätsmedizin, Berlin, Germany; Department of Clinical Immunology and Rheumatology, University of Amsterdam; Department of Rheumatology, Zuyderland Hospital, Heerlen; Department of Rheumatology, Leiden University Medical Center, Leiden, the Netherlands.,M. Hebeisen, MSc, Swiss Clinical Quality Management Foundation; R. Neuenschwander, Department of Rheumatology, Zurich University Hospital; A. Scherer, PhD, Swiss Clinical Quality Management Foundation; P. Exer, MD, Praxis Rheuma-Basel; U. Weber, MD, King Christian 10th Hospital for Rheumatic Diseases, Gråsten, and South Jutland Hospital, Institute of Regional Health Research; G. Tamborrini, MD, Ultrasound Center Rheumatology; R. Micheroli, MD, Department of Rheumatology, Zurich University Hospital; L.M. Wildi, MD, Department of Rheumatology, Zurich University Hospital; P. Zufferey, MD, Department of Rheumatology, CHUV; M.J. Nissen, MD, Department of Rheumatology, University Hospital; P.M. Villiger, MD, Department of Rheumatology and Clinical Immunology, Inselspital; J. Bernhard, MD, Department of Rheumatology and Rehabilitation, Bürgerspital; A. Finckh, MD, PhD, Department of Rheumatology, University Hospital; I.E. van der Horst-Bruinsma, MD, PhD, Department of Rheumatology, VU University Medical Center; J. Sieper, MD, Department of Gastroenterology, Infectiology and Rheumatology, Charité Universitätsmedizin; R. Landewé, MD, PhD, Department of Clinical Immunology and Rheumatology, University of Amsterdam, and Department of Rheumatology, Zuyderland Hospital; D. van der Heijde, MD, PhD, Department of Rheumatology, Leiden University Medical Center; A. Ciurea, MD, Department of Rheumatology, Zurich University Hospital
| | - Désirée van der Heijde
- From the Swiss Clinical Quality Management Foundation; Department of Rheumatology, Zurich University Hospital, Zurich; Praxis Rheuma-Basel, Basel, Switzerland; King Christian 10th Hospital for Rheumatic Diseases, Gråsten; Institute of Regional Health Research, University of Southern Denmark, Odense, Denmark; Ultrasound Center Rheumatology, Basel; Department of Rheumatology, Centre Hospitalier Universitaire Vaudois (CHUV), Lausanne; Department of Rheumatology, University Hospital, Geneva; Department of Rheumatology and Clinical Immunology, Inselspital, Bern; Department of Rheumatology and Rehabilitation, Bürgerspital, Solothurn, Switzerland; Department of Rheumatology, VU University Medical Center, Amsterdam, the Netherlands; Department of Gastroenterology, Infectiology and Rheumatology, Charité Universitätsmedizin, Berlin, Germany; Department of Clinical Immunology and Rheumatology, University of Amsterdam; Department of Rheumatology, Zuyderland Hospital, Heerlen; Department of Rheumatology, Leiden University Medical Center, Leiden, the Netherlands.,M. Hebeisen, MSc, Swiss Clinical Quality Management Foundation; R. Neuenschwander, Department of Rheumatology, Zurich University Hospital; A. Scherer, PhD, Swiss Clinical Quality Management Foundation; P. Exer, MD, Praxis Rheuma-Basel; U. Weber, MD, King Christian 10th Hospital for Rheumatic Diseases, Gråsten, and South Jutland Hospital, Institute of Regional Health Research; G. Tamborrini, MD, Ultrasound Center Rheumatology; R. Micheroli, MD, Department of Rheumatology, Zurich University Hospital; L.M. Wildi, MD, Department of Rheumatology, Zurich University Hospital; P. Zufferey, MD, Department of Rheumatology, CHUV; M.J. Nissen, MD, Department of Rheumatology, University Hospital; P.M. Villiger, MD, Department of Rheumatology and Clinical Immunology, Inselspital; J. Bernhard, MD, Department of Rheumatology and Rehabilitation, Bürgerspital; A. Finckh, MD, PhD, Department of Rheumatology, University Hospital; I.E. van der Horst-Bruinsma, MD, PhD, Department of Rheumatology, VU University Medical Center; J. Sieper, MD, Department of Gastroenterology, Infectiology and Rheumatology, Charité Universitätsmedizin; R. Landewé, MD, PhD, Department of Clinical Immunology and Rheumatology, University of Amsterdam, and Department of Rheumatology, Zuyderland Hospital; D. van der Heijde, MD, PhD, Department of Rheumatology, Leiden University Medical Center; A. Ciurea, MD, Department of Rheumatology, Zurich University Hospital
| | - Adrian Ciurea
- From the Swiss Clinical Quality Management Foundation; Department of Rheumatology, Zurich University Hospital, Zurich; Praxis Rheuma-Basel, Basel, Switzerland; King Christian 10th Hospital for Rheumatic Diseases, Gråsten; Institute of Regional Health Research, University of Southern Denmark, Odense, Denmark; Ultrasound Center Rheumatology, Basel; Department of Rheumatology, Centre Hospitalier Universitaire Vaudois (CHUV), Lausanne; Department of Rheumatology, University Hospital, Geneva; Department of Rheumatology and Clinical Immunology, Inselspital, Bern; Department of Rheumatology and Rehabilitation, Bürgerspital, Solothurn, Switzerland; Department of Rheumatology, VU University Medical Center, Amsterdam, the Netherlands; Department of Gastroenterology, Infectiology and Rheumatology, Charité Universitätsmedizin, Berlin, Germany; Department of Clinical Immunology and Rheumatology, University of Amsterdam; Department of Rheumatology, Zuyderland Hospital, Heerlen; Department of Rheumatology, Leiden University Medical Center, Leiden, the Netherlands. .,M. Hebeisen, MSc, Swiss Clinical Quality Management Foundation; R. Neuenschwander, Department of Rheumatology, Zurich University Hospital; A. Scherer, PhD, Swiss Clinical Quality Management Foundation; P. Exer, MD, Praxis Rheuma-Basel; U. Weber, MD, King Christian 10th Hospital for Rheumatic Diseases, Gråsten, and South Jutland Hospital, Institute of Regional Health Research; G. Tamborrini, MD, Ultrasound Center Rheumatology; R. Micheroli, MD, Department of Rheumatology, Zurich University Hospital; L.M. Wildi, MD, Department of Rheumatology, Zurich University Hospital; P. Zufferey, MD, Department of Rheumatology, CHUV; M.J. Nissen, MD, Department of Rheumatology, University Hospital; P.M. Villiger, MD, Department of Rheumatology and Clinical Immunology, Inselspital; J. Bernhard, MD, Department of Rheumatology and Rehabilitation, Bürgerspital; A. Finckh, MD, PhD, Department of Rheumatology, University Hospital; I.E. van der Horst-Bruinsma, MD, PhD, Department of Rheumatology, VU University Medical Center; J. Sieper, MD, Department of Gastroenterology, Infectiology and Rheumatology, Charité Universitätsmedizin; R. Landewé, MD, PhD, Department of Clinical Immunology and Rheumatology, University of Amsterdam, and Department of Rheumatology, Zuyderland Hospital; D. van der Heijde, MD, PhD, Department of Rheumatology, Leiden University Medical Center; A. Ciurea, MD, Department of Rheumatology, Zurich University Hospital.
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