1. Division of Trauma Surgery, Department of Surgery, Keimyung University Dongsan Medical Center, Daegu, Korea
2. Division of Acute Care Surgery, Department of Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
3. Division of Acute Care Surgery, Department of Surgery, Korea University Guro Hospital, Seoul, Korea
4. Department of Trauma Surgery, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea