1. Department of Geriatric Medicine the Affiliated Hospital of Qingdao University Qingdao China
2. Department of Geriatrics Jiangsu Province Hospital The First Affiliated Hospital of Nanjing Medical University Nanjing China
3. Center of Gerontology and Geriatrics West China Hospital Sichuan University China National Clinical Research Center for Geriatric Medicine Chengdu China
4. Beijing Hospital National Center of Gerontology Institute of Geriatric Medicine Chinese Academy of Medical Sciences Beijing China
5. Institute of Aging, Department of Geriatrics, Tongji Hospital, Tongji Medical College Huazhong University of Science and Technology Wuhan China