1. National Fire Agency, Sejong, Korea
2. Department of Emergency Medicine, Seoul National University Hospital, Seoul, Korea
3. Public Healthcare Center, Seoul National University Hospital, Seoul, Korea
4. College of Medicine, Seoul National University, Seoul, Korea
5. Laboratory of Emergency Medical Services, Seoul National University Hospital Biomedical Research Institute, Seoul, Korea
6. Department of Emergency Medicine, Seoul National University College of Medicine, Seoul, Korea
7. Department of Emergency Medicine, Seoul National University Boramae Medical Center, Seoul, Korea