1. Department of Radiology, Kyungpook National University Hospital, Kyungpook National University School of Medicine, Daegu, Korea.
2. Department of Pathology, Ajou University Hospital, Ajou University School of Medicine & Graduate School of Medicine, Suwon, Korea.
3. Department of Surgery, Kyungpook National University Hospital, Kyungpook National University School of Medicine, Daegu, Korea.