1. Department of Internal Medicine, Division of Gastroenterology Nippon Medical School Chiba Hokusoh Hospital Chiba Japan
2. Department of Internal Medicine, Division of Gastroenterology and Hepatology Nippon Medical School Tokyo Japan
3. Core Research Facilities The Jikei University School of Medicine Tokyo Japan
4. Department of Hepatology Kagawa Prefectural Central Hospital Takamatsu Japan
5. Department of Gastroenterology National Hospital Organization Kyushu Medical Center Fukuoka Japan
6. Gastroenterology Center Ehime Prefectural Central Hospital Matsuyama Japan
7. Division of Gastroenterology and Hepatology Shinmatusdo Central General Hospital Matsudo Japan
8. Department of Internal Medicine, Division of Gastroenterology Kikkoman General Hospital Noda Japan
9. Department of Internal Medicine, Division of Gastroenterology and Hepatology Otakanomori Hospital Chiba Japan
10. Gastroenterological Center Yokohama City University Medical Center Yokohama Japan
11. Department of Gastroenterology Kitasato University School of Medicine Kanagawa Japan
12. Department of Gastroenterology and Hepatology Takamatsu Red Cross Hospital Takamatsu Japan
13. Department of Internal Medicine, Division of Gastroenterology and Hepatology Tokyo Metropolitan Bokutoh Hospital Tokyo Japan
14. Department of Gastroenterology Kagawa University Graduate School of Medicine Kagawa Japan
15. Department of Gastroenterology and Hepatology The Jikei University School of Medicine Tokyo Japan
16. Department of Gastroenterology and Hepatology Jikei University School of Medicine Kashiwa Hospital Chiba Japan
17. Department of Gastroenterology Ogaki Municipal Hospital Gifu Japan
18. Department of Nursing Ogaki Women's College Gifu Japan