1. Department of Cardiology Beijing Hospital National Center of Gerontology Chinese Academy of Medical Sciences Institute of Geriatric Medicine Beijing China
2. Graduate School Chinese Academy of Medical Sciences & Peking Union Medical College Beijing China
3. Department of Plastic Surgery Peking Union Medical College Hospital Beijing China
4. Department of Neurology Beijing Hospital National Center of Gerontology Institute of Geriatric Medicine Chinese Academy of Medical Sciences Beijing China
5. Department of Pathology Beijing Hospital National Center of Gerontology Institute of Geriatric Medicine Chinese Academy of Medical Sciences Beijing China
6. Department of Vascular Surgery Beijing Hospital National Center of Gerontology Institute of Geriatric Medicine Chinese Academy of Medical Sciences Beijing China