1. Department of Emergency Medicine, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea.
2. Department of Emergency Medicine, Bundang Jesaeng Hospital, Daejin Medical Center, Seongnam, Korea.
3. Department of Emergency Medicine, Chung-Ang University College of Medicine, Seoul, Korea.
4. Department of Emergency Medicine, Soonchunhyang University Bucheon Hospital, Bucheon, Korea.
5. Department of Emergency Medicine, Seongnam Citizens Medical Center, Seongnam, Korea.
6. Department of Emergency Medicine, Seoul Metropolitan Government-Seoul National University Boramae Medical Center, Seoul National University College of Medicine, Seoul, Korea.
7. Department of Emergency Medicine, Hallym University Kangdong Sacred Heart Hospital, Seoul, Korea.
8. Department of Emergency Medicine, Dankook University College of Medicine, Cheonan, Korea.
9. Department of Emergency Medicine, Dongguk University Ilsan Hospital, Dongguk University College of Medicine, Goyang, Korea.
10. Department of Emergency Medicine, Chungnam National University Hospital, Daejeon, Korea.
11. Department of Emergency Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
12. Department of Emergency Medicine, Bundang CHA Hospital, CHA University School of Medicine, Seongnam, Korea.
13. Department of Emergency Medicine, St. Vincent's Hospital, College of Medicine, The Catholic University of Korea, Suwon, Korea.
14. Department of Emergency Medicine, College of Medicine, Korea University, Seoul, Korea.
15. Department of Trauma Surgery, Wonkwang University Hospital, Wonkwang University School of Medicine, Iksan, Korea.
16. Department of Emergency Medicine, Seoul National University Bundang Hospital, Seongnam, Korea.
17. Department of Emergency Medicine, Dong-A University Hospital, Dong-A University College of Medicine, Busan, Korea.
18. Department of Pulmonology and Intensive Care Medicine, Dong-A University Hospital, Dong-A University College of Medicine, Busan, Korea.
19. Department of Emergency Medicine, Yeungnam University Medical Center, Daegu, Korea.
20. Department of Emergency Medicine, Hanyang University Guri Hospital, Hanyang University College of Medicine, Guri, Korea.