1. Institute of Geriatrics, Beijing Key Laboratory of Aging and Geriatrics
2. National Clinical Research Center for Geriatrics Diseases
3. State Key Laboratory of Kidney Diseases, Chinese PLA General Hospital, Beijing, China
4. Central Laboratory
5. Management Department, Hainan Branch of Chinese PLA General Hospital, Sanya, China
6. Department of Geriatric Cardiology, Chinese PLA General Hospital, Beijing, China