1. Department of Dermatology, The Third Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi 530031, P.R. China
2. Department of Ophthalmology, The People's Hospital of Leshan, Leshan, Sichuan 614000, P.R. China
3. Department of Radiotherapy, Xuzhou Central Hospital Affiliated to Nanjing University of Chinese Medicine, Xuzhou, Jiangsu 221009, P.R. China