[1] Oslo Univ Hosp, Oslo, Norway
[2] ASST Spedali Civili, Rheumatol & Clin Immunol Unit, Brescia, Italy
[3] VA Nasonova Res Inst Rheumatol, Moscow, Russia
[4] Med Sch Pecs, Pecs, Hungary
[5] Univ Firenze, Florence, Italy
[6] Univ Lille, Lille, France
[7] Chinese Acad Med Sci & Peking Union Med Coll, Dept Rheumatol & Clin Immunol,Key Lab Rheumatol &, Peking Union Med Coll Hosp,Minist Educ,State Key, Natl Clin Res Ctr Dermatol & Immunol Dis,Minist S, Beijing, Peoples R China
[8] Univ Zurich, Univ Zurich Hosp, Dept Rheumatol, Zurich, Switzerland
[9] Univ Clin Schleswit Holstein UKSH, Lubeck, Germany
[10] Natl & Kapodistrian Univ Athens, Joint Acad Rheumatol Program, Sch Med, Athens, Greece
[11] Univ Campania Luigi Vanvitelli, Naples, Italy
[12] Med Univ Bialystok, Bialystok, Poland
[13] Descartes Univ, Cochin Hosp, APHP, Dept Rheumatol A, Paris, France