[1] Univ Grenoble 1, Grenoble Hosp, GREPI CNRS, Dept Rheumatol, F-38041 Grenoble, France
[2] Univ Paris 06, Sorbonne Univ, Dept Rheumatol, Inst Pierre Louis Epidemiol & Sante Publ,GRC UPMC, Paris, France
[3] Hop La Pitie Salpetriere, AP HP, Paris, France
[4] Inst Salud Musculoesquelet, Madrid, Spain
[5] EULAR Standing Comm People Arthritis Rheumatism E, Zurich, Switzerland
[6] Maastricht Univ, Med Ctr, Integrated Care, NL-6200 MD Maastricht, Netherlands
[7] Salisbury NHS Fdn Trust Hosp, Salisbury, Wilts, England
[8] Cyprus League Rheumatism, Nikosia, Cyprus
[9] Ctr Hosp & Univ Coimbra, Dept Rheumatol, Coimbra, Portugal
[10] Hlth Sci Res Unit Nursing UICiSA E, Coimbra, Portugal
[11] Univ Cologne, Dept Internal Med, D-50931 Cologne, Germany
[12] Univ Groningen, Univ Med Ctr Groningen, Div Infect Dis, Dept Internal Med, Groningen, Netherlands
[13] Univ Manchester, Manchester Acad Hlth Sci Ctr, Arthritis Res UK Ctr Epidemiol, Manchester, Lancs, England
[14] Univ Hosp Geneva, Div Rheumatol, Geneva, Switzerland
[15] Charite, German Rheumatism Res Ctr & Rheumatol, Epidemiol Unit, D-13353 Berlin, Germany
[16] Albany Med Coll, Albany, NY 12208 USA
[17] Ctr Rheumatol, Albany, NY USA
[18] Diakonhjemmet Hosp, Dept Rheumatol, Oslo, Norway
[19] Vrije Univ Amsterdam Med Ctr, Amsterdam Rheumatol Immunol Ctr, Amsterdam, Netherlands
[20] Reade, Amsterdam, Netherlands
[21] Leiden Univ, Med Ctr, Dept Rheumatol, NL-2300 RA Leiden, Netherlands
[22] Paris Descartes Univ, Hop Cochin, AP HP,PRES Sorbonne Paris Cite, Dept Rheumatol,INSERM U1153,Clin Epidemiol & Bios, Paris, France