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From the Division of Rheumatology, Koc University Faculty of Medicine, Istanbul; Division
of Rheumatology, Marmara University Faculty of Medicine, Istanbul, Turkey; Division
of Rheumatology, and Department of Biostatistics and Epidemiology, University of Pennsylvania,
Philadelphia, Pennsylvania, USA; Division of Rheumatology, Istanbul University Istanbul
Faculty of Medicine; Division of Rheumatology, Istanbul University Cerrahpasa Faculty
of Medicine, Istanbul, Turkey; Division of Rheumatology, University of California,
Los Angeles, California, USA; Leeds Institute of Rheumatic and Musculoskeletal Medicine,
University of Leeds, Leeds, UK; Department of Internal Medicine, University Paris
Diderot, Paris, France; Division of Rheumatology, Ohio State University, Columbus,
Ohio, USA; Division of Rheumatology, University of Ottawa, Ottawa, Ontario, Canada;
Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University
of Oxford, Oxford, UK; Department of Public Health Sciences, University of Iceland,
Reykjavik, Iceland.S.Z. Aydin, MD, Associate Professor, Division of Rheumatology,
Koc University Faculty of Medicine; H. Direskeneli, MD, Professor of Rheumatology,
Division of Rheumatology, Marmara University Faculty of Medicine; A. Sreih, MD, Assistant
Professor of Medicine, Division of Rheumatology, University of Pennsylvania; F. Alibaz-Oner,
MD, Division of Rheumatology, Marmara University Faculty of Medicine; A. Gul, Professor,
Division of Rheumatology, Istanbul University Istanbul Faculty of Medicine; S. Kamali,
Professor, Division of Rheumatology, Marmara University Faculty of Medicine; G. Hatemi,
Associate Professor, Division of Rheumatology, Istanbul University Cerrahpasa Faculty
of Medicine; T. Kermani, MD, MS, Assistant Clinical Professor, Division of Rheumatology,
University of California at Los Angeles; S.L. Mackie, BM, BCh, PhD, Leeds Institute
of Rheumatic and Musculoskeletal Medicine, University of Leeds; A. Mahr, MD, PhD,
Professo