1. Department of Surgery, Pusan National University School of Medicine, Busan, Korea.
2. Biomedical Research Institute, Pusan National University Hospital, Busan, Korea.
3. Department of Radiology, Pusan National University School of Medicine, Busan, Korea.
4. Department of Internal Medicine, Pusan National University School of Medicine, Busan, Korea.
5. Department of Pathology, Pusan National University School of Medicine, Busan, Korea.
6. Department of Surgery, Gyeongsang National University Changwon Hospital, Changwon, Korea.