[1] Swedish Med Ctr, Dept Rheumatol, Seattle, WA USA
[2] Univ Washington, Seattle, WA 98195 USA
[3] Leiden Univ, Leiden, Netherlands
[4] Univ Rochester, Med Ctr, Allergy Immunol & Rheumatol Div, Rochester, NY 14642 USA
[5] Indiana Univ Sch Med, Div Rheumatol, Dept Med, Indianapolis, IN 46202 USA
[6] Eli Lilly & Co, Indianapolis, IN 46285 USA
[7] Univ Toronto, Toronto, ON, Canada