[1] Univ Hosp Zurich, Dept Rheumatol, Zurich, Switzerland
[2] Federat European Scleroderma Associat FESCA, London, England
[3] Federat European Scleroderma Associat FESCA, Tournai, Belgium
[4] Federat European Scleroderma Associat FESCA, St Maur, Belgium
[5] Univ Paris 05, Paris, France
[6] Cochin Hosp, Dept Rheumatol, Paris, France
[7] Hosp Univ 12 Octubre, Dept Rheumatol, Madrid, Spain
[8] Univ Pecs, Med Sch, Dept Immunol & Rheumatol, Pecs, Hungary
[9] UCL, Ctr Rheumatol, Royal Free Campus, London, England
[10] Lund Univ, Dept Rheumatol, Lund, Sweden
[11] Med Univ Bialystok, Dept Rheumatol & Internal Med, Bialystok, Poland
[12] Univ Florence, Careggi Univ Hosp, Div Rheumatol, Dept Expt & Clin Med, Florence, Italy
[13] Carol Davila Univ Med & Pharm, Cantacuzino Hosp, Dept Rheumatol & Internal Med, Bucharest, Romania
[14] Justus Liebig Univ Giessen, Dept Rheumatol & Clin Immunol, Campus Kerckhoff, Bad Nauheim, Germany
[15] Diakonhjemmet Hosp, Div Rheumatol & Res, Oslo, Norway
[16] Oslo Univ Hosp, Reg Res Support, Oslo, Norway