1. Division of Gastroenterology and Hepatology Nippon Medical School Tokyo Japan
2. Core Research Facilities for Basic Science, Research Center for Medical Sciences The Jikei University School of Medicine Tokyo Japan
3. Division of Gastroenterology and Hepatology, Department of Internal Medicine The Jikei University School of Medicine Tokyo Japan
4. Department of Internal Medicine Japanese Red Cross Himeji Hospital Himeji Japan
5. Department of Gastroenterology and Metabolism Nagoya City University Graduate School of Medical Sciences Nagoya Japan
6. Department of Gastroenterology Saiseikai Niigata Hospital Niigata Japan
7. Division of Gastroenterology and Hepatology Shinmatsudo Central General Hospital Chiba Japan
8. Department of Gastroenterology and Neurology, Faculty of Medicine Kagawa University Kagawa Japan
9. Division of Gastroenterology Nippon Medical School Chiba Hokusoh Hospital Chiba Japan
10. Division of Endocrinology, Diabetes and Metabolism Nippon Medical School Tokyo Japan