1 Department of Dermatology, Shanghai Children's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.
2 Department of Dermatology, Xinhua Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, China.
3 Department of Dermatology, Shanghai Children's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China. qianqf@shchildren.com.cn.