1. The Key Laboratory of Geriatrics, Beijing Institute of Geriatrics, Institute of Geriatric Medicine Chinese Academy of Medical Sciences, Beijing Hospital, National Center of Gerontology of National Health Commission Beijing China
2. Center for Healthy Aging and Development Studies, National School of Development Peking University Beijing China
3. Department of healthcare policy and research Weill Cornell Medicine New York NY USA
4. Department of Orthopedics The Fourth Medical Centre, Chinese PLA General Hospital Beijing China
5. National Clinical Research Center for Orthopedics Sports Medicine & Rehabilitation Beijing China
6. School of Social and Behavioral Sciences Nanjing University Nanjing China
7. Central Laboratory Hainan Hospital of Chinese PLA General Hospital Sanya China
8. China Center for Health Development Studies Peking University Beijing China