1. Department of Rheumatology and Immunology, Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis, Peking University People’s Hospital, Beijing 100044, China
2. Department of Rheumatology and Immunology, Linfen Third People’s Hospital, Linfen, Shanxi 041000, China
3. Department of Rheumatology and Immunology, Huabei Petroleum Administration Bureau General Hospital, Cangzhou, Hebei 062552, China
4. Affiliated Hospital of North Sichuan Medical College, Nanchong, Sichuan 637000, China