Chinese Academy of Medical Sciences & Peking Union Medical College (CAMS & PUMC) - Department of Rheumatology, Chinese Academy of Medical Sciences & Peking Union Medical College (CAMS & PUMC) - Department of Rheumatology, Kunming Medical University - Department of Rheumatology and Immunology, Nanchang University - Department of Rheumatology, Central South University - Department of Rheumatology, The People's Hospital of Guangxi Zhuang Autonomous Region - Department of Rheumatology and Immunology, Hainan General Hospital - Department of Rheumatology and Immunology, Southern Medical University - Department of Rheumatic & TCM Medical Center, Nanchang University - Department of Rheumatology, The People’s Hospital of Xin Jiang Uygur Autonomous Region - Department of Rheumatology and Immunology, Fujian Medical University - Department of Rheumatology, Tianjin Medical University - Department of Rheumatology and Immunology, Peking University - Peking University Clinical Research Institute, Chinese Academy of Medical Sciences & Peking Union Medical College (CAMS & PUMC) - Department of Rheumatology, Chinese Academy of Medical Sciences & Peking Union Medical College (CAMS & PUMC) - Department of Rheumatology, Chinese Academy of Medical Sciences & Peking Union Medical College (CAMS & PUMC) - Department of Rheumatology, Chinese Academy of Medical Sciences & Peking Union Medical College (CAMS & PUMC) - Department of Rheumatology, Peking University - Department of Epidemiology and Biostatistics, Chinese Academy of Medical Sciences & Peking Union Medical College (CAMS & PUMC) - Department of Rheumatology, Chinese Academy of Medical Sciences & Peking Union Medical College (CAMS & PUMC) - Department of Rheumatology and Chinese Academy of Medical Sciences & Peking Union Medical College (CAMS & PUMC) - Department of Rheumatology