Kuang-Yu Niu1, Yun-Kuan Lin2. 1. Department of Emergency Medicine (Niu), Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Linkou, Taiwan; Department of Emergency Medicine (Lin), Hualien Tzu Chi Hospital, Hualien, Taiwan peidra.niu@gmail.com. 2. Department of Emergency Medicine (Niu), Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Linkou, Taiwan; Department of Emergency Medicine (Lin), Hualien Tzu Chi Hospital, Hualien, Taiwan.