1. Department of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, Asan Medical Center, Ulsan, South Korea
2. Department of Radiology and Medical Research Institute, School of Medicine, Ewha Womans University, Seoul, South Korea
3. Division of Liver Transplantation and Hepatobiliary Surgery, and Departments of Surgery, University of Ulsan College of Medicine, Asan Medical Center, Seoul, South Korea