Affiliation: | 1. Department of Gastroenterology and Metabolism, Hiroshima University Hospital, , Hiroshima, Japan;2. Department of Diagnostic Radiology, Hiroshima Red Cross Hospital and Atomic‐bomb Survivors Hospital, , Hiroshima, Japan;3. Department of Diagnostic Radiology, Institute and Graduate School of Biomedical Sciences, Hiroshima University Hospital, , Hiroshima, Japan |