1. Department of Surgery, School of Medicine, Pusan National University, Biomedical Research Institute, Pusan National University Hospital, Busan, Korea.
2. Department of Radiology, School of Medicine, Pusan National University, Biomedical Research Institute, Pusan National University Hospital, Busan, Korea.
3. Department of Pathology, School of Medicine, Pusan National University, Biomedical Research Institute, Pusan National University Hospital, Busan, Korea.