1. Health Management Center, National Clinical Research Center for Geriatrics, West China Hospital/West China School of Medicine Sichuan University Chengdu China
2. Department of Respiratory and Critical Care Medicine, West China Hospital/West China School of Medicine Sichuan University Chengdu China
3. Department of Geriatrics and National Clinical Research Center for Geriatrics, West China Hospital/West China School of Medicine Sichuan University Chengdu Sichuan China