[1] Univ Waterloo, Waterloo, ON, Canada
[2] Univ Calgary, Calgary, AB, Canada
[3] Alberta Hlth Serv, Calgary, AB, Canada
[4] McGill Univ, Montreal, PQ, Canada
[5] Univ Toronto, Toronto, ON, Canada
[6] Hosp Univ Cruces, Biocruces Hlth Res Inst, Bizkaia, Spain
[7] McGill Univ, Div Rheumatol, Dept Med, Hlth Ctr, Montreal, PQ, Canada
[8] Johns Hopkins Univ, Sch Med, Baltimore, MD USA
[9] Univ Manitoba, Winnipeg, MB, Canada
[10] Northwestern Univ, Feinberg Sch Med, Chicago, IL 60611 USA
[11] Univ Laval, CHU Quebec, Dept Rheumatol, Quebec City, PQ, Canada
[12] Hanyang Univ, Dept Rheumatol, Hosp Rheumat Dis, Seoul, South Korea
[13] Natl Univ Singapore Hosp, Singapore, Singapore
[14] Dalhousie Univ, Halifax, NS, Canada
[15] Nova Scotia Hlth Author, Halifax, NS, Canada
[16] Columbia Univ, New York, NY USA
[17] Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Mexico City, DF, Mexico
[18] Ctr Reg Enfermedades Autoinmunes & Reumat CREAR, Rosario, Argentina
[19] Univ Manchester, Manchester, Lancs, England
[20] Cedaus Sinai Med Ctr, West Hollywood, CA USA