1. Department of Dermatology, The Affiliated Qingdao Municipal Hospital of Qingdao University, Qingdao, Shandong 266011, P.R. China
2. Department of Dermatology, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266000, P.R. China
3. Institute of Integrated Medicine, Medical College, Qingdao University, Qingdao, Shandong 266023, P.R. China