1. Department of Radiology, Dankook University Hospital, Dankook University College of Medicine, Cheonan, Korea.
2. Department of Surgery, Dankook University Hospital, Dankook University College of Medicine, Cheonan, Korea.
3. Department of Pathology, Dankook University Hospital, Dankook University College of Medicine, Cheonan, Korea.
4. Department of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.