1. Department of Surgery, Ajou University Hospital, Ajou University School of Medicine, Suwon, Korea.
2. Department of Health Policy and Management, Seoul National University College of Medicine, Seoul, Korea.
3. Department of Preventive Medicine, Seoul National University College of Medicine, Seoul, Korea.
4. Cancer Research Institute, Seoul National University, Seoul, Korea.
5. Department of Trauma Surgery, Pusan National University Hospital, Pusan National University College of Medicine, Busan, Korea.
6. Department of Trauma Surgery, Wonkwang University Hospital, Iksan, Korea.
7. Department of Neurosurgery, Dankook University Hospital, Dankook University College of Medicine, Cheonan, Korea.
8. Department of Emergency Medicine, Wonju Severance Christian Hospital, Yonsei University Wonju College of Medicine, Wonju, Korea.
9. Department of Emergency Medicine, Hallym University Dongtan Sacred Heart Hospital, Hallym University College of Medicine, Hwaseong, Korea.
10. Department of Information and Statistics, Korea National Open University, Seoul, Korea.
11. Department of Emergency Medicine, Seoul National University Hospital, Seoul, Korea.
12. National Emergency Medical Center, National Medical Center, Seoul, Korea.
13. Department of Biomedical Science, Seoul National University College of Medicine, Seoul, Korea.