Affiliation: | 1. Division of Digestive Endoscopy, Shiga University of Medical Science Hospital, Otsu, Shiga, Japan;2. First Department of Medicine, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan;3. Department of Gastroenterology, Shiga University of Medical Science Hospital, Otsu, Shiga, Japan;4. Center for Clinical Research, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan |