1. Clinical Research Center, National Hospital Organization, Nagasaki Medical CenterŌmura Japan
2. Department of Gastroenterology and HepatologyKumamoto University of Medicine Kumamoto Japan
3. Research Center for Medical Glycoscience, National Institute of Advanced Industrial Science and TechnologyTsukuba Japan
4. The Research Center for Hepatitis and Immunology, National Center for Global Health and MedicineIchikawa Japan