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