1. Department of Internal Medicine College of Medicine, Yonsei University Seoul South Korea
2. Department of Hepatobiliary and Pancreatic Surgery, Severance Hospital, College of Medicine Yonsei University Seoul South Korea
3. Institute of Infection, College of Medicine Yonsei University Seoul South Korea
4. Department of Pathology, College of Medicine Yonsei University Seoul South Korea
5. Institute of Gastroenterology, College of Medicine Yonsei University Seoul South Korea
6. Yonsei Liver Center Severance Hospital Seoul South Korea