1. Department of Dermatology, The First People's Hospital of Wujiang, Affiliated Wujiang Hospital of Nantong University, Suzhou, Jiangsu 215200, P.R. China
2. Department of Dermatology, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215004, P.R. China
3. Department of Dermatology, Suzhou Municipal Hospital, Suzhou, Jiangsu 215006, P.R. China