Min Huang1, Chun-Sheng Yang2, Yong Xin1, Guan Jiang3. 1. Department of Radiotherapy, the Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, China. 2. Department of Dermatology, the Affiliated Huai'an Hospital of Xuzhou Medical University, Huai'an 23002, China. 3. Department of Dermatology, the Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, China.