1. Department of Surgery, Yonsei University College of Medicine, Seoul, Korea
2. Department of Surgery, National Health Insurance Corporation Ilsan Hospital, Goyang, Korea
3. Department of Pathology, Yonsei University College of Medicine, Seoul, Korea
4. Yonsei Liver Cancer Special Clinic, Yonsei University College of Medicine, Seoul, Korea
5. The Research Institute for Transplantation, Yonsei University College of Medicine, Seoul, Korea
6. Graduate School of Medical Science, Brain Korea 21 Project, Yonsei University College of Medicine, Seoul, Korea