[1] Hosp Special Surg, Rheumatol, New York, NY 10021 USA
[2] Hosp Special Surg, Epidemiol & Biostat, New York, NY 10021 USA
[3] Univ Texas Houston, Med Sch Houston, Rheumatol, Houston, TX USA
[4] Columbia Univ Coll Phys & Surg, Rheumatol, New York, NY 10032 USA
[5] Univ Pittsburgh, Med Rheumatol, Pittsburgh, PA USA
[6] Med Univ S Carolina, Dept Med, Charleston, SC 29425 USA
[7] Northwestern Univ, Feinberg Sch Med, Div Rheumatol, Chicago, IL 60611 USA
[8] Univ Michigan, Div Rheumatol, Ann Arbor, MI 48109 USA
[9] Johns Hopkins Univ, Sch Med, Rheumatol, Baltimore, MD USA
[10] George Washington Univ, Div Rheumatol, Washington, DC USA
[11] Georgetown Univ, Med Ctr, Rheumatol, Washington, DC 20007 USA
[12] Univ Utah, Div Rheumatol, Salt Lake City, UT USA