1. Department of Surgery, Pusan National University Yangsan Hospital, Yangsan, Korea.
2. Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Yangsan, Korea.
3. Department of Internal Medicine, Pusan National University Yangsan Hospital, Yangsan, Korea.
4. Department of Surgery, Pusan National University School of Medicine, Yangsan, Korea.
5. Department of Pathology, Pusan National University Yangsan Hospital, Yangsan, Korea.