Affiliation: | 1. Department of Pathology, Chung-Ang University Hospital, Chung-Ang University College of Medicine, Seoul 156-755, South Korea;2. Department of Pathology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Gyeonggi 463-707, South Korea;3. Department of Pathology, Seoul National University Hospital, Seoul National University College of Medicine, Seoul 110-744, South Korea;4. Department of Surgery, Chung-Ang University Hospital, Chung-Ang University College of Medicine, Seoul 156-755, South Korea |