1. Dermatology Hospital, Southern Medical University, Guangzhou, Guangdong 510095, P.R. China
2. Department of Dermatology, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510000, P.R. China
3. Department of Dermatology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong 524001, P.R. China