作者单位:Yale Sch Med, West Haven Vet Affairs Hlth Syst, Div Rheumatol, New Haven, CT USA[1]Brigham & Womens Hosp, Div Rheumatol, 60 Fenwood Rd, Boston, MA 02115 USA[2]Univ Massachusetts, Sch Med, Dept Orthopaed & Phys Rehabil, Worcester, MA USA[3]Brigham & Womens Hosp, Div Gen Med, Boston, MA 02115 USA[4]Univ Vienna, Div Rheumatol, Vienna, Austria[5]