Affiliation: | 1. Department of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan;2. Medical Center for Clinical and Translational Research, Hiroshima University Hospital, Hiroshima, Japan;3. Department of Internal Medicine, Hiroshima City Hiroshima Citizens Hospital, Hiroshima, Japan;4. Department of Gastroenterology, Okayama City Hospital, Okayama, Japan;5. Department of Internal Medicine, Fukuyama City Hospital, Hiroshima, Japan;6. Department of Internal Medicine, Japanese Red Cross Okayama Hospital, Okayama, Japan;7. Department of Gastroenterology, Mitoyo General Hospital, Kannonji, Japan |