Author contributions
T.M., H.N.
H.N. and R.M. wrote the paper. H.N., R.M., S.I., and S.O. designed the study. R.T. and Y.S. analyzed the data. H.S., I.O., S.Y., T.M., K.K., Y.K., Y.M., M.K., S.M., and T.Y. performed endoscopy and collected the data. J.K. and N.K. supervised the study. All authors reviewed the manuscript.