RT Journal Article SR Electronic T1 Choosing the best approach for laterally spreading lesions at the anorectal junction JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 1003 OP 1004 DO 10.1136/gutjnl-2020-322392 VO 70 IS 5 A1 João Santos-Antunes A1 Margarida Marques A1 Fátima Carneiro A1 Guilherme Macedo YR 2021 UL http://gut.bmj.com/content/70/5/1003.abstract AB