1. Department of Dermatology, Peking University People's Hospital, Beijing 100044, China
2. Department of Dermatology, Beijing Children's Hospital, Capital Medical University, Beijing 100045, China
3. Department of Phototherapy at Shanghai Skin Disease Hospital, School of Medicine, Tongji University, Shanghai 200443, China
4. Department of Dermatology, The First Hospital of China Medical University, Shenyang, Liaoning 110001, China
5. Department of Dermatology, Second Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, China
6. Department of Dermatology, Affiliated Hospital of Guizhou Medical University, Guiyang, Guizhou 550004, China.