Affiliation: | 1. Department of Gastroenterology and Oncology, Institute of Health Biosciences, The University of Tokushima Graduate School, , Tokushima;2. Department of Gastroenterology, Kagawa Prefectural Cancer Detection Center, , Takamatsu, Japan;3. Department of Gastroenterology, Nijinohashi Clinic, , Tokushima;4. Division of Pathology, Tokushima University Hospital, , Tokushima |