1. Department of Radiology, Seoul National University Bundang Hospital, Seongnam 463-707, Korea.
2. Department of Pathology, Seoul National University Bundang Hospital, Seongnam 463-707, Korea.
3. Department of Surgery, Seoul National University Bundang Hospital, Seongnam 463-707, Korea.
4. Department of Radiology, Gyeongsang National University Hospital, Jinju 660-702, Korea.