1. Department of Hepatology Tokyo Metropolitan Cancer and Infectious Diseases Center Komagome Hospital Tokyo Japan
2. Department of Gastroenterology International University of Health and Welfare Hospital Nasushiobara Japan
3. Department of Microbiology and Cell Biology Tokyo Metropolitan Institute of Medical Science Tokyo Japan
4. Department of Human Pathology Kanazawa University Graduate School of Medicine Kanazawa Japan
5. Clinical Research Center National Hospital Organization Nagasaki Medical Center Omura Japan
6. Division of Virology Department of Infection and Immunity Jichi Medical University School of Medicine Tochigi Japan
7. Division of Gastroenterology Department of Medicine Jichi Medical University Tochigi Japan
8. Department of Medicine Teikyo University School of Medicine Tokyo Japan
9. The Research Center for Hepatitis and Immunology National Center for Global Health and Medicine Ichikawa Japan
10. Department of Gastroenterology Tokyo Metropolitan Cancer and Infectious Diseases Center Komagome Hospital Tokyo Japan