[1] Peking Union Med Coll Hosp, Dept Rheumatol, Beijing, Peoples R China
[2] Columbia Univ, Irving Med Ctr, Div Rheumatol, New York, NY USA
[3] Fourth Mil Med Univ, Xijing Hosp, Xian, Shaanxi, Peoples R China
[4] Chinese Acad Med Sci, Inst Basic Med Sci, Dept Epidemiol & Biostat, Beijing, Peoples R China
[5] Peking Union Med Coll, Beijing, Peoples R China
[6] Southern Med Univ, Nanfang Hosp, Dept Rheumatol & Immunol, Guangzhou, Guangdong, Peoples R China
[7] Guangxi Med Univ, Liated Hosp 1, Dept Rheumatol & Immunol, Nanning, Guangxi, Peoples R China
[8] First Peoples Hosp Yunnan Prov, Dept Rheumatol, Kunming, Yunnan, Peoples R China