RT Journal Article SR Electronic T1 Endoscopic transmural route for dissection of gastric submucosal tumors with extraluminal growth: experience in two cases JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP gutjnl-2021-324027 DO 10.1136/gutjnl-2021-324027 A1 Xinyang Liu A1 Tianyin Chen A1 Jing Cheng A1 Pingting Gao A1 Quanlin Li A1 Weifeng Chen A1 Yiqun Zhang A1 Pinghong Zhou A1 Jianwei Hu YR 2021 UL http://gut.bmj.com/content/early/2021/02/10/gutjnl-2021-324027.abstract AB