1. Department of Emergency Medicine, Seoul National University Hospital, Seoul, Republic of Korea.
2. Department of Emergency Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea.
3. Institute of Medical and Biological Engineering, Medical Research Center, Seoul National University, Seoul, Republic of Korea.
4. Interdisciplinary Program of Bioengineering, College of Engineering, Seoul National University, Seoul, Republic of Korea.
5. Division of Critical Care Medicine, Seoul National University Hospital, Seoul, Republic of Korea.
6. Department of Emergency Medicine, Keimyung University Dongsan Hospital, Daegu, Republic of Korea.
7. Department of Emergency Medicine, Uijeongbu Eulji Medical Center, Gyeonggi-do, Republic of Korea.
8. Department of Biomedical Engineering, Seoul National University College of Medicine, Seoul, Republic of Korea.