[1] Univ Oxford, NDORMS, Oxford, England
[2] Hosp Italiano Buenos Aires, Rheumatol, Buenos Aires, DF, Argentina
[3] Keele Univ, Sch Primary Community & Social Care, Keele, Staffs, England
[4] GRAPPA, Oslo, Norway
[5] Univ Utah, Dermatol, Salt Lake City, UT USA
[6] Santa Casa Sao Paulo, Rheumatol, Sao Paulo, Brazil
[7] GRAPPA, Hong Kong, Peoples R China
[8] Univ Toronto, Rheumatol, Toronto, ON, Canada
[9] Hosp Univ San Ignacio, Rheumatol, Bogota, Colombia
[10] Univ Coll Dublin, Rheumatol, Dublin, Ireland
[11] Donald & Barbara Zucker Sch Med Hofstra Northwell, Dermatol, Hempstead, NY USA
[12] Toronto Western Hosp, Schroeder Arthrit Inst, Toronto, ON, Canada
[13] GRAPPA, Durham, NC USA
[14] Duke Univ, Rheumatol, Durham, NC USA
[15] GRAPPA, Seattle, WA USA
[16] Univ Leeds, Leeds Inst Rheumatol & Musculoskeletal Med, Leeds, W Yorkshire, England
[17] Cleveland Clin Main Campus, Rheumatol, Cleveland, OH USA
[18] Univ Cambridge, Rheumatol, Cambridge, England
[19] GRAPPA, Haifa, Israel
[20] Churchill Hosp, Dermatol, Oxford, England
[21] GRAPPA, West Granby, CT USA
[22] Singapore Gen Hosp, Rheumatol, Singapore, Singapore
[23] GRAPPA, Propser, TX USA
[24] Univ Molise, Rheumatol, Campobasso, Italy
[25] Hosp Italiano Buenos Aires, Dermatol, Buenos Aires, DF, Argentina
[26] GRAPPA, Toronto, ON, Canada
[27] Swedish Med Ctr, Rheumatol, Seattle, WA USA
[28] Univ Washington, Rheumatol, Seattle, WA USA
[29] GRAPPA, Dublin, Ireland
[30] Univ Penn, Rheumatol, Philadelphia, PA 19104 USA
[31] GRAPPA, Eindhoven, Netherlands
[32] GRAPPA, Cleveland, OH USA
[33] GRAPPA, Amsterdam, Netherlands
[34] Keele Univ, Sch Primary Community & Social Care, Keele, Staffs, England
[35] Univ Calif San Diego, Rheumatol, La Jolla, CA 92093 USA