Jin Wei1, Yu Zhang2, Jiang Jin1, Jianzhong Zhang3. 1. Department of Dermatology, Peking University People's Hospital, Beijing 100044, China. 2. Department of Dermatology, China Aerospace 731 Hospital, Beijing 100074, China. 3. Department of Dermatology, Peking University People's Hospital, Beijing 100044, China. Email: rmzjz@126.com.