[1] Univ Zurich, Univ Zurich Hosp, Dept Rheumatol, Zurich, Switzerland
[2] Radboud Univ Nijmegen, Dept Rheumatol, Med Ctr, Nijmegen, Netherlands
[3] Univ Florence, Dept Stat, Comp Sci, Applicat, Florence, Italy
[4] Hosp Univ 12 Octubre, Madrid, Spain
[5] Luigi Vanvitelli Univ Campania, Dept Precis Med, Naples, Italy
[6] Univ Lille, Lille, France
[7] Hosp Univ Santa Creu & St Pau, Rheumatol, St Just Desvern, Spain
[8] Charles Univ Prague, Fac Med 1, Dept Rheumatol, Inst Rheumatol, Prague, Czech Republic
[9] Rambam Hlth Care Campus, Rheumatol Inst, Haifa, Israel
[10] Technion, Rappaport Fac Med, Haifa, Israel
[11] Spedali Civili Brescia, Scleroderma UNIT, UOC Reumatol & Immunol Clin, Piazzale Spedali Civili 1, I-25123 Brescia, Italy
[12] Tel Aviv Sourasky Med Ctr, Tel Aviv, Israel
[13] Univ Med Ctr, Comprehens Pulm Hypertens Ctr, New Orleans, LA USA
[14] New Orleans Scleroderma & Sarcoidosis Patient Car, ILD Clin Programs, New Orleans, LA USA
[15] Radboud Univ Nijmegen, Med Ctr, Nijmegen, Netherlands
[16] Leiden Univ, Med Ctr, Leiden, Netherlands
[17] Oslo Univ Hosp, Dept Rheumatol, Oslo, Norway
[18] IRCCS San Raffaele Hosp, Unit Immunol Rheumatol Allergy & Rare Dis, Milan, Italy
[19] Univ Zurich, Univ Zurich Hosp, Dept Rheumatol, Zurich, Switzerland