[1] Univ Vita Salute San Raffaele, IRCCS San Raffaele Hosp, Unit Immunol Rheumatol Allergy & Rare Disease, Milan, Italy
[2] Bordeaux Univ Hosp, Bordeaux, France
[3] Radboud Univ Nijmegen, Nijmegen Med Ctr, Nijmegen, Netherlands
[4] Luigi Vanvitelli Univ Campania, Dept Precis Med, Naples, Italy
[5] VA Nasonova Res Inst Rheumatol Russian Federat, Moscow, Russia
[6] Univ Lille, Lille, France
[7] Ghent Univ Hosp, Ghent, Belgium
[8] Ion Cantacuzino Clin Hosp, Dept Internal Med & Rheumatol, Bucharest, Romania
[9] Charles Univ Prague, Inst Rheumatol, Dept Rheumatol, Fac Med 1, Prague, Czech Republic
[10] Univ Ksln, Ksln, Germany
[11] Univ Calif Los Angeles, Los Angeles, CA USA
[12] Univ Granollers, Granollers, Spain
[13] Hosp Univ 12 Octubre, Madrid, Spain
[14] Univ Leeds, Leeds Inst Rheumat & Muskuloskeletal Med, Leeds, England
[15] IRCCS San Raffaele Hosp, Unit Immunol Rheumatol Allergy & Rare Dis, Milan, Italy
[16] Oslo Univ Hosp, Dept Rheumatol, Oslo, Norway