1. Neurophysiology Laboratory, Department of Surgery, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
2. Department of Statistics, College of Management, National Cheng Kung University, Tainan, Taiwan
3. School of Pharmacy, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan