Affiliation: | Current affiliations: Division of Gastroenterology, Department of Internal Medicine (B.J.L., J.-J.P., M.K.J., J.H.K., J.E.Y., J.S.K., H.J.C., K.S.B., J.H.C., C.D.K. Y.-T.B.), Department of Surgery (Y.-J.J., Y.J.M.), Korea University College of Medicine, Seoul, South Korea |