1. Department of General Medicine, Xiangya Hospital, Central South University, Changsha 410008, China
2. International Collaborative Research Center for Medical Metabolomics, Xiangya Hospital, Central South University, Changsha 410008, China
3. National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha 410008, China
4. Department of Rheumatology and Immunology, Xiangya Hospital, Central South University, Changsha 410008, China