1. Department of Surgery, Pusan National University Hospital, Busan 602-739, Republic of Korea
2. Department of Radiology, Pusan National University Hospital, School of Medicine, Pusan National University, Yangsan-si 626-770, Republic of Korea
3. Department of Pathology, Pusan National University Yangsan Hospital, Yangsan-si 626-770, Republic of Korea
4. Department of Pathology, School of Medicine, Pusan National University, Yangsan-si 626-770, Republic of Korea
5. Department of Pathology, Pusan National University Hospital, Busan 602-739, Republic of Korea