[1] Univ Michigan, Div Rheumatol, Ann Arbor, MI 48109 USA
[2] Paris Descartes Univ, Cochin Hosp, APHP, Rheumatol Dept A, Paris, France
[3] UCL, Div Med, Ctr Rheumatol, London, England
[4] Nippon Med Sch, Grad Sch Med, Dept Allergy & Rheumatol, Tokyo, Japan
[5] Univ Florence, Dept Expt & Clin Med, Florence, Italy
[6] Univ Western Ontario, Schulich Sch Med, Div Rheumatol, London, ON, Canada
[7] Hokkaido Univ, Fac Med, Dept Rheumatol Endocrinol & Nephrol, Sapporo, Hokkaido, Japan
[8] Hokkaido Univ, Grad Sch Med, Sapporo, Hokkaido, Japan
[9] Charles Univ Prague, Inst Rheumatol, Dept Rheumatol, Fac Med 1, Prague, Czech Republic
[10] Univ Pecs, Dept Rheumatol & Immunol, Pecs, Hungary
[11] Lille Univ, Dept Internal Med & Clin Immunol, Claude Huriez Hosp, Sch Med, Lille, France
[12] Tohoku Univ Hosp, Clin Res Innovat & Educ Ctr, Sendai, Miyagi, Japan
[13] Gunma Univ, Postgrad Sch Med, Dept Dermatol, Maebashi, Gunma, Japan
[14] Univ Toronto, Toronto Scleroderma Res Program, Toronto Western Hosp, Div Rheumatol,Dept Med,Univ Hlth Network,Mt Sinai, Toronto, ON, Canada
[15] Katholieke Univ Leuven, Lab Tissue Homeostasis & Dis, Skeletal Biol & Engn Res Ctr, Dept Dev & Regenerat, Leuven, Belgium
[16] Univ Pisa, Dept Clin & Expt Med, Rheumatol Unit, Pisa, Italy
[17] Univ Roma La Sapienza, Dept Clin Med & Therapy, Rome, Italy
[18] Michigan Med Univ Hosp, Dept Internal Med, Div Rheumatol, Ann Arbor, MI USA
[19] Med Univ South Carolina, Div Rheumatol & Immunol, Charleston, SC 29425 USA
[20] Ghent Univ Hosp, Dept Rheumatol & Internal Med, Ghent, Belgium
[21] Georgetown Univ, Med Ctr, Div Rheumatol, Washington, DC 20007 USA
[22] St Vincents Hosp Melbourne, Dept Rheumatol, Melbourne, Vic, Australia
[23] Univ Debrecen, Dept Internal Med, Div Rheumatol, Debrecen, Hungary
[24] CHU Bordeaux, Dept Rheumatol, Bordeaux, France
[25] Bayer AG, Res & Dev, Wuppertal, Germany
[26] StatFinn Oy, Espoo, Finland
[27] Bayer HealthCare Pharmaceut Inc, Whippany, NJ USA
[28] Bayer Healthcare, Beijing, Peoples R China
[29] Univ Hosp, Dept Rheumatol, Zurich, Switzerland