1. Department of Gastroenterology and Hepatology, Japan Red Cross Society Wakayama Medical Center
2. Department of Gastroenterology and Hepatology, Osaka Red Cross Hospital
3. Department of Pathology, Nara Hospital Kinki University Faculty of Medicine
4. Department of Clinical Laboratory Medicine, Kurume University Hospital
5. Department of Human Pathology, Kanazawa University Graduate School of Medical Science
6. Department of Radiology, Kanazawa University Graduate School of Medical Science