1. Department of Emergency Medicine; Inje University College of Medicine and Seoul Paik Hospital; Seoul Korea
2. Department of Emergency Medicine; Seoul National University Hospital/Seoul National University College of Medicine; Seoul Korea
3. Department of Emergency Medicine; Seoul National University College of Medicine, Seoul Metropolitan Government Seoul National University Boramae Medical Center; Seoul Korea
4. Laboratory of Emergency Medical Services; Seoul National University Hospital Biomedical Research Institute; Seoul Korea
5. Department of Emergency Medicine; Myongji Hospital; Gyeonggi Korea
6. Department of Emergency Medicine; Inha University College of Medicine; Incheon Korea
7. Department of Emergency Medicine; Korea University College of Medicine and Anam Hospital; Seoul Korea
8. Department of Emergency Medicine; Sejong General Hospital; Bucheon, Gyeonggi Korea