1. Department of Surgery, Seoul National University College of Medicine, Seoul, Korea.
2. Department of Surgery, Seoul Metropolitan Government - Seoul National University Boramae Medical Center, Seoul, Korea.
3. Department of Radiology, Seoul National University College of Medicine, Seoul, Korea.
4. Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea.
5. Liver Cancer Center, National Cancer Center, Goyang, Korea.