[1] Harvard Med Sch, Massachusetts Gen Hosp, Div Rheumatol, Boston, MA USA
[2] New Zealand Minist Hlth, Auckland, New Zealand
[3] ARC, Amsterdam, Netherlands
[4] UCL, Inst Child Hlth, Dept Paediat Rheumatol, London, England
[5] Great Ormond St Hosp NHS Fdn Trust, London, England
[6] Univ Texas Southwestern Med Ctr Dallas, Psychiat, Dallas, TX 75390 USA
[7] Genentech Inc, San Francisco, CA 94080 USA
[8] Charite Univ Med Berlin, Rheumatol & Clin Immunol, Berlin, Germany
[9] Harvard Med Sch, Massachusetts Gen Hosp, Rheumatol Allergy & Immunol, Boston, MA USA
[10] Pinnacle Inc, Quebec City, PQ, Canada
[11] Univ Calif San Francisco, Neurol, San Francisco, CA 94143 USA
[12] Queens Univ Belfast, Dept Resp Med, Belfast, Antrim, North Ireland
[13] Imperial Coll London, Dept Med, London, England
[14] Harvard Med Sch, Massachusetts Gen Hosp, Allergy Immunol & Rheumatol, Boston, MA USA
[15] Univ New South Wales, Dept Dermatol, Sydney, NSW, Australia
[16] Johns Hopkins Univ, Sch Med, Rheumatol Div, Baltimore, MD USA
[17] Oregon Hlth & Sci Univ, Portland, OR 97201 USA
[18] Univ Alabama Birmingham, Sch Med, Div Clin Immunol & Rheumatol, Birmingham, AL USA
[19] Toronto Western Hosp, Med, Toronto, ON, Canada
[20] Univ Toronto, Toronto, ON, Canada
[21] Harvard Med Sch, Rheumatol Unit, Massachusetts Gen Hosp, Boston, MA USA