1. Department of Geriatrics, Shanghai Fourth People’s Hospital Affiliated to Tongji University, Shanghai, China
2. Department of Information Management, School of Management, Shanghai University, Shanghai, China
3. Department of Respiratory, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
4. Department of General Practice, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
5. School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai, China