Abstract: Guo Yifeng, Li Ping, Tang Jianping, Han Xiuping, Zong Wenkai, Wang Hua, Liu Qiang, Xiao Fengli, Zou Xiaoyan, Wei Fenglei, Wang Min, Cheng Ruhong, Gu Heng, Ma Lin, Yao Zhirong Department of Dermatology, Xin Hua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 200092, China （Guo YF, Cheng RH, Yao ZR）; Department of Dermatology, Shenzhen Children′s Hospital, Shenzhen 518038, China （Li P）; Department of Dermatology, Hunan Children′s Hospital, Changsha 410007, China （Tang JP）; Department of Dermatology, Shengjing Hospital of China Medical University, Shenyang 110004, China （Han XP）; Department of Dermatology, Hospital of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing 210042, China （Zong WK, Gu H）; Department of Dermatology, Children′s Hospital of Chongqing Medical University, Chongqing 400014, China （Wang H）; Department of Dermatology, Children′s Hospital of Shanxi, Taiyuan 030013, China （Liu Q）; Department of Dermatology, First Affiliated Hospital, Anhui Medical University, Hefei 230022, China （Xiao FL）; Department of Dermatology and Venereology, Hubei Maternal and Child Health Hospital, Wuhan 430070, China （Zou XY）; Department of Dermatology, Dalian Children′s Hospital, Dalian 116012, China （Wei FL）; Department of Dermatology, Chengdu Women & Children′s Central Hospital, Chengdu 610031, China （Wang M）; Department of Dermatology, Beijing Children′s Hospital, Capital Medical University, Beijing 100045, China （Ma L）