1. Department of General Medicine; Kanazawa University Graduate School of Medical Science; Kanazawa Ishikawa Japan
2. Department of Gastroenterology; Kanazawa University Graduate School of Medical Science; Kanazawa Ishikawa Japan
3. Department of Radiology; Kanazawa University Graduate School of Medical Science; Kanazawa Ishikawa Japan
4. Faculty of Health Sciences, Institute of Medical, Pharmaceutical and Health Sciences; Kanazawa University; Kanazawa Ishikawa Japan
5. Department of Pathology; Kanazawa University Graduate School of Medical Science; Kanazawa Ishikawa Japan
6. Department of Gastroenterologic Surgery; Kanazawa University Graduate School of Medical Science; Kanazawa Ishikawa Japan
7. Second Department of Internal Medicine; Fukui University School of Medicine; Fukui Japan
8. Department of Surgery, Institute of Gastroenterology; Tokyo Women's Medical University; Tokyo Japan
9. Department of Digestive Surgery; Nihon University School of Medicine; Tokyo Japan
10. Department of Hepato-Biliary-Pancreatic Surgery; Tokyo Medical and Dental University; Tokyo Japan
11. Laboratory of Human Carcinogenesis; Center for Cancer Research, National Cancer Institute; Bethesda MD USA