1. Department of Surgery, Yonsei University Wonju College of Medicine, Wonju, Korea.
2. Trauma Center, Wonju Severance Christian Hospital, Wonju, Korea.
3. Wonju Severance Surgical Research Group, Wonju Severance Christian Hospital, Wonju, Korea.
4. Department of Surgery, Trauma Center, National Health Insurance Service Ilsan Hospital, Goyang, Korea.