1. Department of Dermatology & Venereology; West China Hospital, Sichuan University; Chengdu China
2. Rehabilitation Center; West China Hospital, Sichuan University; Chengdu China
3. The Center of Gerontology and Geriatrics; West China Hospital, Sichuan University; Chengdu China
4. Department of Medical Insurance Office; West China Hospital of Sichuan University; Chengdu China