Affiliation: | 1. Department of Gastroenterology and Hepatology, Shimane University School of Medicine, Izumo, Japan;2. Division of Gastroenterology, Matsue City Hospital, Matsue, Japan;3. Department of Clinical Pathology, Shimane University School of Medicine, Izumo, Japan;4. Health Center, Shimane Environment and Health Public Corporation, Matsue, Japan |