1. Center for Digestive and Liver Diseases; Nara City Hospital; Nara Japan
2. Department of Gastroenterology and Hepatology; Kyoto Prefectural University of Medicine; Kyoto Japan
3. Department of Pathology; Nara City Hospital; Nara Japan
4. Anti-Aging Medical Science, Division of Basic Research; Louis Pasteur Center for Medical Research; Kyoto Japan
5. Kyoto Prefectural University of Medicine; Kyoto Japan