Pei-Rong Gao1, Hsi Yen1, Wei-Ti Chen2. 1. Department of Dermatology (Gao, Yen, Chen) and Drug Hypersensitivity Clinical and Research Center (Chen), Chang Gung Memorial Hospital, Linkou, Taiwan; College of Medicine (Gao, Yen, Chen), Chang Gung University, Taoyuan, Taiwan; Graduate Institute of Immunology (Chen), College of Medicine, National Taiwan University, Taipei, Taiwan. 2. Department of Dermatology (Gao, Yen, Chen) and Drug Hypersensitivity Clinical and Research Center (Chen), Chang Gung Memorial Hospital, Linkou, Taiwan; College of Medicine (Gao, Yen, Chen), Chang Gung University, Taoyuan, Taiwan; Graduate Institute of Immunology (Chen), College of Medicine, National Taiwan University, Taipei, Taiwan greatedisonchen@gmail.com.