Affiliation: | Department of Gastroenterology and Hepatology (T.I., A.S., F.I., T.K., T.T., K.I., S.T., T.G.), Tokyo Medical University, Tokyo, Japan, Endoscopic Division (T.G.), International Medical Center, Tokyo, Japan, Digestive Disease Center (J.H.M.), Soon Chun Hyang University School of Medicine, Seoul, Korea |