1 Hospital for Skin Diseases, Shandong First Medical University, Jinan, China; Shandong Provincial Institute of Dermatology and Venereology, Shandong Academy of Medical Sciences, Jinan, China.
2 Hospital for Skin Diseases, Shandong First Medical University, Jinan, China; Shandong Provincial Institute of Dermatology and Venereology, Shandong Academy of Medical Sciences, Jinan, China. Electronic address: baofangfang2008@163.com.