[1] Hosp Gen Univ Elda, Reumatol, F-75674 Alicante, Spain
[2] Leiden Univ, Med Ctr, Rheumatol, Leiden, Netherlands
[3] Univ Hosp Ctr Zagreb, Zagreb, Croatia
[4] Hop Cochin, Paris, France
[5] Univ Paris 05, INSERM Epidemiol Clin & Biostat U1153, PRES Sorbonne Paris Cite, Paris, France
[6] Hop La Pitie Salpetriere, AP HP, Dept Rheumatol, Paris, France
[7] Univ Paris 06, Sorbonne Univ, Paris, France
[8] Diakonhjemmet Hosp, Oslo, Norway
[9] Karolinska Univ Hosp, Dept Med, Rheumatol Unit, Solna, Sweden
[10] Karolinska Inst, Stockholm, Sweden
[11] Med Univ Vienna, Dpt Rheumatol, Vienna, Austria
[12] Univ Hosp Leicester, Rheumatol, Leicester, Leics, England
[13] Hosp Univ Coimbra, Ctr Hosp & Univ Coimbra, EPE, Coimbra, Portugal
[14] ARC Amsterdam, Rheumatol & Clin Immunol, Utrecht, Netherlands
[15] UMC Utrecht, Utrecht, Netherlands