1. Department of Geriatric Medicine, Beijing Meitan General Hospital, NO.29 XiBaHe South Road, Chaoyang District, Beijing100028, P.R.China
2. Department of Geriatric Medicine, Beijing Meitan General Hospital, Beijing100028, P.R.China
3. Department of Radiology, Beijing Hospital of Traditional Chinese Medicine, Capital Medical University, Beijing100010, P.R.China
4. Department of Geriatric Medicine, Beijing Chaoyang Hospital, Capital Medical University, Beijing100020, P.R.China
5. Department of Gerontology, Meitan General Hospital, Beijing100028, P.R.China
6. Department of Cardiology, Beijing Aerospace General Hospital, Beijing100010, P.R.China
7. Department of Cardiology, Beijing Meitan General Hospital, Beijing100028, P.R.China