[1] Ghent Univ Hosp, Dept Rheumatol, Ghent, Belgium
[2] Univ Ghent, Dept Internal Med, Ghent, Belgium
[3] Univ Ferrara, Dept Med Sci, Sect Rheumatol, Ferrara, Italy
[4] Italian Soc Rheumatol SIR, Epidemiol Unit, Milan, Italy
[5] Univ Pisa, Dept Clin & Expt Med, Rheumatol Unit, Pisa, Italy
[6] Azienda Osped Spedali Civili Brescia, Rheumatol & Clin Immunol Unit, Brescia, Italy
[7] Charite, Dept Rheumatol, Berlin, Germany
[8] Charite, Clin Immunol Unit, Berlin, Germany
[9] Univ Paris 05, Serv Med Interne, Paris, France
[10] Hop Cochin, AP HP, Ctr Reference Malad Syst Autoimmunes Rares France, Paris, France
[11] Univ Florence, Dept Clin & Expt Med, Florence, Italy
[12] AOU Careggi, Div Rheumatol, Florence, Italy
[13] AOU Careggi, Scleroderma Unit, Florence, Italy
[14] Univ Pavia, Dept Rheumatol, Pavia, Italy
[15] IRCCS Policlin San Matteo, Dept Rheumatol, Pavia, Italy
[16] Erasmus MC, Dept Internal Med, Rotterdam, Netherlands
[17] Erasmus MC, Dept Immunol, Rotterdam, Netherlands
[18] Leiden Univ, Dept Rheumatol, Med Ctr, Leiden, Netherlands
[19] Univ Hosp Zurich, Dept Rheumatol, Zurich, Switzerland
[20] Federat European Scleroderma Assoc FESCA, Brussels, Belgium
[21] Univ Lille, Depnt Med Interne & Immunol Clin, Lille, France
[22] CHU Lille, Ctr Reference Malad Syst & Autoimmunes Rares Nord, LIRIC, INSERM, Lille, France
[23] Hosp Pitie Salpetriere, Dept Internal Med, Paris, France
[24] Univ Genoa, IRCCS San Martino Polyclin Hosp, Res Lab, Genoa, Italy
[25] Univ Genoa, IRCCS San Martino Polyclin Hosp, Acad Div Clin Rheumatol, Dept Internal Med, Genoa, Italy
[26] Ghent Univ Hosp, Dept Cardiol, Ghent, Belgium
[27] Catholic Univ Louvain, Dept Rheumatol, Louvain La Neuve, Belgium
[28] Clin Univ St Luc, Dept Rheumatol, Louvain La Neuve, Belgium
[29] Radboud Univ Nijmegen, Med Ctr Nijmegen, Dept Rheumatol, Nijmegen, Netherlands
[30] Sint Maartensklin, Dept Rheumatol, Nijmegen, Netherlands
[31] Univ Amsterdam, Acad Med Ctr, Clin Immunol & Rheumatol, Amsterdam Rheumatol & Immunol Ctr, Amsterdam, Netherlands
[32] Amsterdam UMC, Dept Rheumatol, Amsterdam, Netherlands
[33] Vrije Univ Amsterdam, Amsterdam Infect & Immun Inst, Amsterdam, Netherlands
[34] Univ Padua, Dept Med, Div Rheumatol, Padua, Italy
[35] Charite, Dept Rheumatol & Clin Immunol, Berlin, Germany
[36] Ctr Hosp Lisboa Norte, Hosp Santa Maria, Dept Rheumatol, Lisbon, Portugal
[37] Univ Lisbon, Fac Med, Inst Med Mol, Lisbon, Portugal
[38] Flemish Patient Org Hereditary Collagen Disorders, Koersel, Belgium
[39] Justus Liebig Univ Giessen, Dept Rheumatol & Clin Immunol, Kerckhoff Klin, Giessen, Germany
[40] Heinrich Heine Univ Dusseldorf, Med Fac, Inst Rheumatol, Hiller Res Unit Rheumatol, Dusseldorf, Germany
[41] Univ Med Ctr Utrecht, Dept Rheumatol & Clin Immunol, Utrecht, Netherlands
[42] LPCDR, Portuguese League Rheumat Dis, Lisbon, Portugal
[43] Univ Pisa, Dept Internal Med, Rheumatol Unit, Pisa, Italy