1. Department of Thoracic and Cardiovascular Surgery, Yonsei University Wonju College of Medicine, Wonju, Korea.
2. Department of Surgery, Yonsei University Wonju College of Medicine, Wonju, Korea.
3. Department of Emergency Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea.
4. Department of Anesthesiology and Pain Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea.