1. Department of Radiology, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
2. Department of Radiology, Soonchunhyang University Hospital Bucheon, Soonchunhyang University College of Medicine, Bucheon, Korea.
3. National Cancer Control Institute, National Cancer Center, Goyang, Korea.
4. Department of Radiology, Dankook University Hospital, Dankook University College of Medicine, Cheonan, Korea.
5. Department of Radiology, Soonchunhyang University Hospital, Soonchunhyang University College of Medicine, Seoul, Korea.
6. Department of Radiology, Dong-A University Hospital, Busan, Korea.
7. Department of Radiology, Wonkwang University Hospital, Wonkwang University School of Medicine, Iksan, Korea.
8. Department of Radiology, Chonbuk National University Hospital, Jeonju, Korea.