Affiliation: | (1) Division of Endoscopy, Shimane Prefectural Central Hospital, Izumo, Japan;(2) Division of Endoscopy, Shimane University Hospital, 89-1 Enya-cho, Izumo Shimane, 693-8501, Japan;(3) Division of Gastroenterology, Matsue Red Cross Hospital, Matsue, Japan;(4) Second Department of Internal Medicine, Shimane University, Faculty of Medicine, Izumo, Japan; |