1. Department of Nuclear Medicine, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.
2. Department of Radiology, Research Institute of Radiological Science, Severance Hospital, Yonsei University College of Medicine, 50-1 Yonsei-ro, Seodaemun-gu, Seoul 03722, Korea.
3. Department of Hepatobiliary Pancreatic Surgery, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.
4. Department of Pathology, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.