1. Department of Gastroenterology and Hepatology, Faculty of Medicine Kindai University
2. Department of Gastroenterology and Hepatology Musashino Red Cross Hospital
3. Department of Hepatobiliary and Pancreatic Oncology National Cancer Center Hospital East
4. Department of Gastroenterology and Metabolism, Graduate School of Biomedical and Health Science Hiroshima University
5. Department of Gastroenterology Ehime Prefectural Central Hospital
6. Division of Gastroenterology, Department of Medicine Kurume University School of Medicine
7. Department of Gastroenterology and Hepatology, Graduate School of Medicine Hokkaido University