Affiliation: | 1. Department of Gastroenterology, Seirei Hamamatsu General Hospital, Hamamatsu, Japan;2. Department of Pathology, Seirei Hamamatsu General Hospital, Hamamatsu, Japan;3. Department of Digestive Surgery, Seirei Hamamatsu General Hospital, Hamamatsu, Japan;4. Department of Pathology, Tachikawa General Hospital, Nagaoka, Japan |