1. Department of Anesthesiology, Kaohsiung Medical University Hospital, Kaohsiung 80756, Taiwan
2. Department of Anesthesiology, School of Post-Baccalaureate, College of Medicine, Kaohsiung Medical University, Kaohsiung 80756, Taiwan
3. Department of Anesthesiology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 701401, Taiwan
4. Department of Anesthesia, An-Nan Hospital, China Medical University, Tainan 70965, Taiwan
5. Department of Physiology, National Cheng Kung University Medical College, Tainan 70101, Taiwan
6. School of Medicine, National Sun-Yat Sen University College of Medicine, Kaohsiung 80424, Taiwan
7. Department of Research and Education, An-Nan Hospital, China Medical University, Tainan 70965, Taiwan