1. Department of Cardiology, Beijing Hospital, National Center of Gerontology Institute of Geriatric Medicine, Chinese Academy of Medical Sciences Beijing China
2. Neurology Department, Beijing Hospital, National Center of Gerontology Institute of Geriatric Medicine, Chinese Academy of Medical Sciences Beijing China
3. Department of Geriatric Medicine Affiliated Hospital of Qinghai University Xining China
4. School of Basic Medicine Peking University Beijing China