[1] Peking Univ, Dept Rheumatol & Immunol, Peoples Hosp, Beijing 100044, Peoples R China
[2] Peking Univ, Dept Rheumatol & Immunol, Shougang Hosp, Beijing 100044, Peoples R China
[3] Shanxi Med Univ, Dept Rheumatol & Immunol, Affiliated Hosp 2, Taiyuan, Shanxi, Peoples R China
[4] Baotou Med Coll, Dept Rheumatol & Immunol, Affiliated Hosp 1, Baotou, Inner Mongolia, Peoples R China
[5] China Japan Friendship Hosp, Dept Rheumatol, Beijing, Peoples R China
[6] Fourth Mil Med Univ, Dept Rheumatol & Immunol, Xijing Hosp, Xian 710032, Shaanxi, Peoples R China
[7] Hebei Med Univ, Dept Rheumatol & Immunol, Hosp 2, Shijiazhuang, Hebei, Peoples R China
[8] Hebei Med Univ, Dept Rheumatol & Immunol, Hosp 3, Shijiazhuang, Hebei, Peoples R China
[9] Peking Univ, Dept Rheumatol & Immunol, Hosp 3, Beijing 100044, Peoples R China
[10] North China Coal Med Univ, Dept Rheumatol & Immunol, Affiliated Kailuan Hosp, Tangshan, Hebei, Peoples R China
[11] Peking Univ, Dept Rheumatol & Immunol, Hosp 1, Beijing 100044, Peoples R China
[12] Bethune Int Peace Hosp, Dept Rheumatol & Immunol, Shijiazhuang, Hebei, Peoples R China
[13] Cent Hosp Handan City, Dept Rheumatol & Immunol, Handan, Hebei, Peoples R China
[14] Hebei Peoples Hosp, Dept Rheumatol & Immunol, Shijiazhuang, Hebei, Peoples R China
[15] Peoples Hosp Guangxi, Dept Rheumatol & Immunol, Nanning, Guangxi, Peoples R China
[16] China Med Univ, Dept Rheumatol & Immunol, Beijing Shunyi Hosp, Beijing, Peoples R China
[17] Huazhong Univ Sci & Technol, Dept Rheumatol, Tongji Hosp, Tongji Med Coll, Wuhan 430074, Hubei, Peoples R China
[18] Sun Yat Sen Univ, Affiliated Hosp 1, Dept Rheumatol & Clin Immunol, Guangzhou 510275, Guangdong, Peoples R China
[19] Beijing Hosp, Dept Rheumatol & Immunol, Beijing, Peoples R China
[20] Shandong Univ, Dept Rheumatol, Qilu Hosp, Jinan, Shandong, Peoples R China
[21] Cangzhou Hosp Integrated Tradit Chinese & Western, Dept Rheumatol & Immunol, Cangzhou, Hebei, Peoples R China
[22] Peoples Hosp Xinjiang Uygur Autonomous Reg, Dept Rheumatol & Immunol, Urumqi, Xinjiang, Peoples R China
[23] Xi An Jiao Tong Univ, Dept Rheumatol & Immunol, Affiliated Hosp 1, Xian 710049, Shaanxi, Peoples R China
[24] Tianjin Med Univ, Dept Infect Dis & Rheumatol, Gen Hosp, Tianjin, Peoples R China
[25] Lanzhou Univ, Dept Rheumatol, Hosp 2, Lanzhou 730000, Gansu, Peoples R China
[26] Beijing Xuanwu Hosp, Dept Rheumatol & Immunol, Beijing, Peoples R China
[27] Lanzhou Univ, Dept Rheumatol & Immunol, Affiliated Hosp 5, Lanzhou 730000, Gansu, Peoples R China
[28] 309th Hosp Chinese Peoples Liberat Army, Dept Rheumatol & Immunol, Beijing, Peoples R China
[29] Peking Univ, Dept Clin Epidemiol, Peoples Hosp, Beijing 100044, Peoples R China