1. Department of Epidemiology, School of Public Health and Jiangsu Key Laboratory of Preventive and Translational Medicine for Geriatric Diseases, Medical College of Soochow University, Suzhou, Jiangsu, P.R. China
2. Department of Dermatology, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, P.R. China
3. School of Nursing, Medical College of Soochow University, Suzhou, Jiangsu, P.R. China