[1] Karolinska Inst, Unit Clin Res Therapy Inflammatory Dis ClinTrid, Stockholm, Sweden
[2] Diakonhjemmet Hosp, Oslo, Norway
[3] Russian Acad Med Sci, Inst Rheumatol, ARBITER, Moscow 109801, Russia
[4] Glostrup Univ Hosp, Ctr Rheumatol & Spine Dis, DANBIO, Glostrup, Denmark
[5] Aarhus Univ Hosp, Dept Rheumatol, DK-8000 Aarhus, Denmark
[6] Charles Univ Prague, Inst Rheumatol, Fac Med 1, Prague, Czech Republic
[7] Charles Univ Prague, Dept Rheumatol, Fac Med 1, Prague, Czech Republic
[8] Univ Hosp Geneva, SCQM Registry, Geneva, Switzerland
[9] Univ Helsinki, Cent Hosp, ROB FIN, Helsinki, Finland
[10] Univ Lisbon, Fac Med, Inst Mol Med, P-1699 Lisbon, Portugal
[11] Hosp Santa Maria, EPE, Ctr Hosp Lisboa Norte, Dept Rheumatol, Lisbon, Portugal
[12] Univ Med Ctr Ljubljana, Ljubljana, Slovenia
[13] Radboud Univ Nijmegen, Med Ctr, NL-6525 ED Nijmegen, Netherlands
[14] Hosp Clin Univ, Santiago, Spain
[15] Dr I Cantacuzino Hosp, Bucharest, Romania
[16] Karolinska Inst, Unit Clin Therapy Res ClinTrid, Stockholm, Sweden
[17] Karolinska Inst, Dept Med, Rheumatol Unit, Stockholm, Sweden