[1] Vrije Univ Amsterdam Med Ctr, Amsterdam Rheumatol & Immunol Ctr, Dept Rheumatol, Amsterdam, Netherlands
[2] Charite, Ctr Musculoskeletal Surg CMSC, Dept Orthoped & Traumatol, Med Pk Berlin Humboldtm~hle, Berlin, Germany
[3] Univ Hosp, Dept Geriatr & Aging Res, Zurich, Switzerland
[4] Univ Zurich, Zurich, Switzerland
[5] Med Univ Innsbruck, Dept Trauma Surg, Innsbruck, Austria
[6] Jagiellonian Univ, Krakow Med Ctr, Fac Hlth & Sci, Dept Bone & Joint Dis, Krakow, Poland
[7] Univ Coimbra, Fac Med, Dept Rheumatol, Coimbra, Portugal
[8] Univ Coimbra, Cent Hosp, Coimbra, Portugal
[9] Univ Zaragoza, Dept Surg, Zaragoza, Spain
[10] Univ Geneva, Fac Med, Dept Surg, Div Orthopaed, Geneva, Switzerland
[11] Diakonhjemmet Hosp, Dept Rheumatol, Oslo, Norway
[12] Bellevue Univ Med Ctr, St Joseph Univ, Fac Med, Beirut, Lebanon
[13] UCL, London, England
[14] Ctr Hospitalier Univ Toulouse, Hop Rangueil, Dept Orthopaed Surg, Toulouse, France
[15] Univ Ulm, Ulm, Germany
[16] Semmelweis Univ, Natl Inst Rheumatol & Physiotherapy, Dept Internal Med 3, Rheumatol Chair, Budapest, Hungary
[17] Paris Descartes Univ, Cochin Hosp, INSERM 1153, Dept Rheumatol, Paris, France
[18] Univ Genoa, Dept Internal Med, Div Clin Rheumatol, Res Lab & Acad, Genoa, Italy
[19] Univ Roma Tor Vergata, Dept Orthopaed & Traumatol, Rome, Italy
[20] Maastricht Univ, CAPHRI Sch Publ Hlth & Primary Care, Dept Family Med, Maastricht, Netherlands
[21] Royal Cornwall Hosp, Knowledge Spa, Bone & Joint Res Grp, Truro, England
[22] Maastricht Univ, NUTRIM Sch Nutr & Translat Res Metab, Dept Internal Med, Maastricht, Netherlands
[23] VieCuri Med Ctr, Dept Internal Med, Venlo, Netherlands
[24] Maastricht Univ, Med Ctr, Dept Internal Med, Rheumatol, Maastricht, Netherlands
[25] Univ Hasselt, Hasselt, Belgium