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