1. Department of Radiology, Dongsan Medical Center, Keimyung University School of Medicine, Daegu-704-701, Korea.
2. Department of Pathology, Dongsan Medical Center, Keimyung University School of Medicine, Daegu-704-701, Korea.
3. Department of Surgery, Dongsan Medical Center, Keimyung University School of Medicine, Daegu-704-701, Korea.