1. Department of Gastroenterology National Hospital Organization Hakodate National Hospital Hakodate Hokkaido Japan
2. Department of Clinical Laboratory Sciences Shinshu University School of Medicine Nagano Hyogo Japan
3. Department of Pediatrics Hyogo College of Medicine Nishinomiya Hyogo Japan
4. Department of Public Health Aichi Medical University School of Medicine Nagakute Aichi Japan
5. Department of Gastroenterology International University of Health and Welfare Hospital Nasushiobara Tochigi Japan
6. Aomori General Health Examination Center Aomori Japan
7. Fellowship Training Center, Medical Education Center Keio University School of Medicine Tokyo Japan
8. Department of Molecular Gastroenterology and Hepatology Kyoto Prefectural University of Medicine Kyoto Japan
9. Center for Clinical Research Hamamatsu University School of Medicine Hamamatsu Shizuoka Japan
10. Department of Gastroenterology, Faculty of Medicine Oita University Oita Japan
11. Department of Cancer Prevention and Therapeutics Graduate School of Medicine and Pharmaceutical Sciences University of Toyama Toyama Japan
12. Department of Gastroenterology Kohnodai Hospital, National Center for Global Health and Medicine Ichikawa Japan
13. Department of Gastroenterology Kosei Hospital Tokyo Japan