1. Division of Trauma Surgery, Department of Surgery, Ajou University School of Medicine, Suwon, Korea.
2. Division of Biostatistics, Department of Population Health, New York University Grossman School of Medicine, New York, NY, USA.
3. Gyeonggi South Regional Trauma Center, Ajou University Hospital, Suwon, Korea.
4. National Emergency Medical Center, National Medical Center, Seoul, Korea.
5. Department of Health Policy and Management, Seoul National University College of Medicine, Seoul, Korea.
6. Department of Emergency Medicine, Dankook University Hospital, Cheonan, Korea.
7. Department of Neurosurgery, Trauma Center, Dankook University Hospital, Cheonan, Korea.
8. Department of Traumatology, Gachon University College of Medicine, Gachon University Gil Medical Center, Incheon, Korea.
9. Department of Trauma and Surgical Critical Care and Medical Research Institute, Pusan National University Hospital, Busan, Korea.
10. Department of Emergency Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea.
11. Department of Emergency Medicine, Ulsan University College of Medicine, Ulsan, Korea.
12. Department of Trauma Surgery Hanyang University of Medicine, Myongi Hospital, Goyang, Korea.