1. Department of Dermatology, Shanghai Ninth People's Hospital, Shanghai Jiaotong University, School of Medicine, Shanghai 200011, P.R. China
2. Department of Dermatology, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, Zhejiang 310014, P.R. China
3. Department of Dermatology, Huashan Hospital, Fudan University, Shanghai 200041, P.R. China