Affiliation: | Current affiliations: Departments of Gastroenterology (H.I., Y.N., O.T., Y.I., Y.Y., H.Y., J.L., T.S., T.A., S.M., N.Y., N.S., K.H., T.T., N.T., M.T., M.O.) and Endoscopy and Endoscopic Surgery (T.K., M.O.), Faculty of Medicine, University of Tokyo, Research and Development Center, Zeon Medical Inc (Y.T.), Tokyo, Japan |