1. Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju, South Korea;
2. Department of Internal Medicine, Gachon university, Gil Medical Center, Incheon, South Korea;
3. Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, South Korea;
4. Department of Internal Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea;
5. National Health Insurance Corporation Ilsan Hospital, Goyang, South Korea;
6. Department of Internal Medicine, Dongguk University Ilsan Hospital, Dongguk University, Goyang, South Korea;
7. Center for Liver Cancer, National Cancer Center, Goyang, South Korea