[1] Hosp Southern Norway, Dept Rheumatol, Kristiansand, Norway
[2] Univ Oslo, Inst Clin Med, Oslo, Norway
[3] Univ Zurich, Univ Zurich Hosp, Dept Rheumatol, Zurich, Switzerland
[4] Oslo Univ Hosp, Oslo Ctr Biostat & Epidemiol, Res Support Serv, Rikshosp, Oslo, Norway
[5] Hosp Univ 12 Octubre, Madrid, Spain
[6] Spedali Civili Brescia, Scleroderma UNIT, UOC Reumatol Immunol Clin, Piazzale Spedali Civili 1, I-25123 Brescia, Italy
[7] Hosp Univ Vall dHebronh, Dept Internal Med, Syst Autoimmune Dis Unit, Barcelona, Spain
[8] Bordeaux Univ Hosp, Bordeaux, France
[9] Univ Verona, Rheumatol Sect, Dept Med, Verona, Italy
[10] Technion, Inst Rheumatol, Rambam Hlth Care Campus, Haifa, Israel
[11] Technion, Rappaport Fac Med, Haifa, Israel
[12] Univ Poitiers, Poitiers Univ Hosp, Dept Internal Med, INSERM U1313, Poitiers, France
[13] UCL, London, England
[14] Osped Riuniti Marche, Ancona, Italy
[15] Oslo Univ Hosp, Oslo, Norway
[16] Sorlandet Sykehus, Kristiansand, Norway
[17] Univ Hosp Oslo, Dept Rheumatol, Oslo, Norway
[18] Oslo Univ Hosp, Dept Cardiol, Rikshosp, Oslo, Norway
[19] Univ Oslo, Expt Med Res Inst, KG Jebsen Ctr, Oslo, Norway
[20] Univ Occupat & Environm Hlth, Kitakyushu, Fukuoka, Japan
[21] Univ Clin Schleswit Holstein UKSH, Lubeck, Germany
[22] Justus Liebig Univ Giessen, Campus Kerckhoff, Bad Nauheim, Germany
[23] IRCCS San Raffaele Hosp, Unit Immunol Rheumatol Allergy & Rare Dis, Milan, Italy
[24] Hosp Santa Creu i Sant Pau, Barcelona, Spain
[25] Charite, Dept Rheumatol, Charite Pl 1, D-10117 Berlin, Germany
[26] Univ Lille, Lille, France