1. West China Hospital, Sichuan University; Department of Dermatology & Venereology; No. 37, Guo Xue Xiang Chengdu Sichuan China 610041
2. West China Hospital, Sichuan University; Center of Geriatrics and Gerontology; No. 37, Guo Xue Lane Chengdu Sichuan China 610041
3. CLĺNICA GO&FER; Unit of Dermatology; Riera Blanca 6-8, L´Hospitalet Barcelona Spain 08903
4. Coventry University; Centre for Technology Enabled Health Research (CTEHR); Priory Street Coventry UK CV1 5FB