1. Department of Surgery, Seoul National University Bundang Hospital, Seoul National University College of Medicine, 166 Gumi-ro, Bundang-gu, Seongnam-si, Gyeonggi-do, 463-707, Korea
2. Department of Radiology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, 166 Gumi-ro, Bundang-gu, Seongnam-si, Gyeonggi-do, 463-707, Korea