RT Journal Article SR Electronic T1 Unusual pedunculated gastric polypoid lesion JF Frontline Gastroenterology JO Frontline Gastroenterol FD BMJ Publishing Group Ltd SP flgastro-2020-101700 DO 10.1136/flgastro-2020-101700 A1 Asahiro Morishita A1 Joji Tani A1 Tsutomu Masaki YR 2020 UL http://fg.bmj.com/content/early/2021/02/07/flgastro-2020-101700.abstract AB