1. Department of Radiology, Chungnam National University Hospital, Chungnam National University School of Medicine, Daejeon, Korea.
2. Department of Surgery, Chungnam National University Hospital, Chungnam National University School of Medicine, Daejeon, Korea.
3. Department of Pathology, Chungnam National University Hospital, Chungnam National University School of Medicine, Daejeon, Korea.