1. Eight-Year Medical Doctor Program, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing 100730, China.
2. Department of Rheumatology and Clinical Immunology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, National Clinical Research Center for Dermatologic and Immunologic Diseases (NCRC-DID), Ministry of Science & Technology, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Key Laboratory of Rheumatology and Clinical Immunology, Ministry of Education, Beijing 100730, China.
3. Department of Rheumatology and Immunology, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, Fujian 362000, China.
4. Department of Rheumatology, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, China.
5. Department of Rheumatology, The First Affiliated Hospital of Henan University of Science and Technology, Luoyang, Henan 471003, China.
6. Department of Rheumatology, Affiliated Hospital of Inner Mongolia Medical College, Hohhot, Inner Mongolia Autonomous Region 010030, China.
7. Department of Rheumatology, First Affiliated Hospital of Jilin University, Changchun, Jilin 130021, China.
8. Department of Rheumatology, Beijing Shijitan Hospital, Capital Medical University, Beijing 100038, China.
9. Department of Epidemiology and Biostatistics, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences & School of Basic Medicine, Peking Union Medical College, Beijing 100006, China.