1. Department of Disease Control and Homeostasis, Kanazawa University Graduate School of Medical Science, Ishikawa, Japan;
2. Department of Epidemiology and Public Health, Kanazawa Medical University, Ishikawa, Japan;
3. Department of Gastroenterology, Kanazawa University Hospital, Ishikawa, Japan;
4. Division of Pathology, Kanazawa University Hospital, Ishikawa, Japan;
5. Department of Human Pathology, Kanazawa University Graduate School of Medical Science, Ishikawa, Japan.