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