1. Department of Radiology, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea.
2. Institute of Radiation Medicine, Seoul National University Medical Research Center, Seoul, Korea.
3. Department of Radiology, Gangnam Severance Hospital, Research Institute of Radiological Science, Yonsei University College of Medicine, Seoul, Korea.
4. Department of Radiology, Severance Hospital, Research Institute of Radiological Science, Yonsei University College of Medicine, Seoul, Korea.
5. Department of Radiology, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
6. Department of Gastroenterology, Asan Liver Center, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
7. Department of Radiology and Research Institute of Radiology, Asan Liver Center, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
8. Department of Radiology, National Cancer Center, Goyang, Korea.
9. Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea.