1. Department of Radiology, College of Medicine, Catholic University of Korea, Daejeon St. Mary's Hospital, Deajeon, Korea.
2. Department of Surgery, College of Medicine, ChungNam National University Hospital, Daejeon, Korea.
3. Department of Radiology, Halla General Hospital, Jeju, Korea.
4. Department of Pathology, College of Medicine, Catholic University of Korea, Daejeon St. Mary's Hospital, Daejeon, Korea.
5. Department of Pathology, College of Medicine, Catholic University of Korea, St. Mary's Hospital, Seoul, Korea.
6. Department of Pathology, Eulji University Medical Center, Daejeon, Korea.