Affiliation: | 1 Department of Gastroenterology and Metabolism, Graduate School of Biomedical Sciences, Hiroshima University, Hiroshima, Japan;2 Department of Endoscopy, Hiroshima University Hospital, Hiroshima, Japan;3 Department of Health Service Center, Hiroshima University Hospital, Hiroshima, Japan;4 Department of Pathology, Hiroshima University Hospital, Hiroshima, Japan |