1. Department of Pathophysiology and Therapeutics, Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo, Japan
2. Department of Gastroenterology and Hepatology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
3. Department of Internal Medicine, Natsuizaka Clinic, Sapporo, Japan
4. Genome Medical Sciences Project, National Center for Global Health Medicine, Tokyo, Japan
5. Department of Therapeutic Oncology, Kyoto University Graduate School of Medicine, Kyoto, Japan
6. Department of General Surgery, Chiba University Graduate School of Medicine, Chiba, Japan
7. Department of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan
8. Department of Pathology, Kochi Medical School, Kochi, Japan