[1] Med Univ Bialystok, Dept Rheumatol & Internal Med, Bialystok, Poland
[2] Univ Hosp, Dept Rheumatol & Internal Med, Maastricht, Netherlands
[3] RDU, Rheumatol Dept A, Paris, France
[4] Univ Florence, Dept Biomed, Div Rheumatol, I-50134 Florence, Italy
[5] UP, Dept Rheumatol, Pecs, Hungary
[6] Univ Calif Los Angeles, Dept Rheumatol, Los Angeles, CA USA
[7] RFH, Dept Rheumatol, London, England
[8] HSL, Dept Internal Med, Paris, France
[9] FESCA, Scleroderma Assoc, Harlesden, England
[10] Klin Eilbek, Dept Pediat Rheumatol, Hamburg, Germany
[11] JLU, Dept Rheumatol, Bad Nauheim, Germany
[12] UMI, Dept Rheumatol, Ann Arbor, MI USA
[13] MUSC, Dept Rheumatol, Charleston, SC USA
[14] USM, Dept Dermatol, Kanazawa, Ishikawa, Japan
[15] FESCA, Scleroderma Assoc, Budapest, Hungary
[16] Univ Basel, UH, Dept Rheumatol, Basel, Switzerland
[17] SU, Dept Rheumatol, Naples, Italy
[18] Rheumatol Ctr Sint Maartensklin, Nijmegen, Netherlands
[19] JHU, Dept Rheumatol, Baltimore, MD USA
[20] Univ Padua, Dept Pediat, Padua, Italy