1. Department of Radiology and Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
2. Department of Health Sciences and Technology, SAIHST, Sungkyunkwan University, Seoul, Korea.
3. Department of Radiology, Seoul National University Hospital, Seoul, Korea.
4. Department of Radiology, Seoul National University College of Medicine, Seoul, Korea.
5. Institute of Radiation Medicine, Seoul National University Medical Research Center, Seoul, Korea.
6. Center for Liver and Pancreatobiliary Cancer and Department of Radiology, National Cancer Center, Goyang, Korea.