1. Department of Emergency Medicine, E-Da Dachang Hospital, I-Shou University, Kaohsiung City, Taiwan
2. School of Medicine, College of Medicine, I-Shou University, Kaohsiung city, Taiwan
3. Department of Anesthesiology, Chi Mei Medical Center, Liouying, Tainan city, Taiwan
4. Department of Emergency Medicine, E-Da Hospital, I-Shou University, Kaohsiung city, Taiwan
5. Department of Anesthesiology, Chi Mei Medical Center, Tainan city, Taiwan