1. Department of Geriatrics, Xiangya Hospital, Central South University, Changsha 410008, China
2. National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha 410008, China
3. Department of Rheumatology and Immunology, Xiangya Hospital, Central South University, Changsha 410008, China
4. Provincial Clinical Research Center for Rheumatic and Immunologic Diseases, Xiangya Hospital, Central South University, Changsha 410008, China