Hao-Yuan Lee1, Cheng-Hsun Chiu2. 1. Department of Pediatrics, Wei Gong Memorial Hospital, Miaoli, Taiwan; Department of Nursing, Jen-Teh Junior College of Medicine, Nursing and Management, Miaoli, Taiwan; School of Medicine, College of Medicine, Fu Jen Catholic University, New Taipei, Taiwan. 2. Molecular Infectious Disease Research Center, Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Taoyuan, Taiwan; Department of Pediatrics, Chang Gung Children's Hospital, Chang Gung University College of Medicine, Taoyuan, Taiwan. Electronic address: chchiu@adm.cgmh.org.tw.