Department of Dermatology, The Second Hospital of Dalian Medical University, No.467 Zhongshan Road, Dalian, Liaoning Province 116027, PR China. Department of Dermatology, The Second Hospital of Dalian Medical University, No.467 Zhongshan Road, Dalian, Liaoning Province 116027, PR China; Institute of Integrative Medicine, Dalian Medical University, No.9 West Section Lvshun South Road, Dalian, Liaoning Province 116044, PR China. Electronic address: zrx_1980@126.com. Department of Dermatology, The Second Hospital of Dalian Medical University, No.467 Zhongshan Road, Dalian, Liaoning Province 116027, PR China; Institute of Integrative Medicine, Dalian Medical University, No.9 West Section Lvshun South Road, Dalian, Liaoning Province 116044, PR China. Electronic address: tucx2010@sina.com.