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.