1. 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), Key Laboratory of Rheumatology and Clinical Immunology Ministry of Education Beijing China
2. Department of Rheumatology and Immunology The Second People's Hospital of Wuhu Wuhu China
3. Department of Epidemiology and Biostatistics, Institute of Basic Medical Sciences Chinese Academy of Medical Sciences & Peking Union Medical College Beijing China
4. The Division of Rheumatology The Affiliated Hospital of Inner Mongolia Medical University Hohhot China
5. Department of Rheumatology The Second Affiliated Hospital of Nanchang University Nanchang China
6. Department of Rheumatology and Immunology The People's Hospital of the Xinjiang Uygur Autonomous Region Urumqi China
7. Department of Rheumatology First Affiliated Hospital of Baotou Medical College Baotou China
8. Department of Rheumatology ZiBo Central Hospital Zibo China
9. Department of Rheumatology The First Affiliated Hospital of Kunming Medical University Kunming China