1. Department of Geriatrics and National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University , Chengdu, Sichuan Province , China
2. Department of Biomedical Engineering, Sichuan University Library , Chengdu, Sichuan Province , China
3. Department of Applied Mechanics, Sichuan University , Chengdu, Sichuan Province , China
4. Global Health Research Center, Duke Kunshan University , Kunshan, Jiangsu Province , China