1. Department of Internal Medicine, Soon Chun Hyang University Hospital Bucheon, Soon Chun Hyang University College of Medicine, Bucheon, Korea.
2. Department of Pathology, The Catholic University of Korea Seoul St. Mary's Hospital, The Catholic University of Korea College of Medicine, Seoul, Korea.
3. The Catholic University of Korea Liver Research Center & WHO Collaborating Center of Viral Hepatitis, The Catholic University of Korea College of Medicine, Seoul, Korea.
4. Department of Internal Medicine, The Catholic University of Korea Seoul St. Mary's Hospital, The Catholic University of Korea College of Medicine, Seoul, Korea.
5. Department of Internal Medicine, The Catholic University of Korea Uijeongbu St. Mary's Hospital, The Catholic University of Korea College of Medicine, Uijeongbu, Korea.
6. Department of Internal Medicine, The Catholic University of Korea Yeouido St. Mary's Hospital, The Catholic University of Korea College of Medicine, Seoul, Korea.
7. Department of Internal Medicine, The Catholic University of Korea Bucheon St. Mary's Hospital, The Catholic University of Korea College of Medicine, Bucheon, Korea.
8. Department of Internal Medicine, The Catholic University of Korea St. Paul's Hospital, The Catholic University of Korea College of Medicine, Seoul, Korea.
9. Department of Internal Medicine, The Catholic University of Korea St. Vincent's Hospital, The Catholic University of Korea College of Medicine, Suwon, Korea.
10. Department of Internal Medicine, The Catholic University of Korea Incheon St. Mary's Hospital, The Catholic University of Korea College of Medicine, Incheon, Korea.
11. Department of Internal Medicine, Soon Chun Hyang University Hospital Seoul, Soon Chun Hyang University College of Medicine, Seoul, Korea.
12. Department of Pathology, Soon Chun Hyang University Hospital Bucheon, Soon Chun Hyang University College of Medicine, Bucheon, Korea.
13. Department of Internal Medicine, Chungbuk National University, College of Medicine, Cheongju, Korea.