1. Department of Surgery, Chungbuk National University Hospital, Cheongju, Republic of Korea
2. Deparment of Trauma Surgery, Trauma Center, Chungbuk National University Hospital, Cheongju, Republic of Korea
3. Department of Trauma Surgery, College of Medicine, Chungbuk National University, Cheongju, Republic of Korea
4. Department of Cardiovascular and Thoracic Surgery, Trauma Center, Chungbuk National University Hospital, Cheongju, Republic of Korea
5. Department of Anesthesiology and Pain Medicine, Chungbuk National University Hospital, Cheongju, Republic of Korea
6. Department of Neurosurgery, Chungbuk National University Hospital, Cheongju, Republic of Korea.