RT Journal Article SR Electronic T1 Secondary prevention of gastric cancer: merging the endoscopic atrophic border with OLGA staging JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 1151 OP 1152 DO 10.1136/gutjnl-2019-319107 VO 69 IS 6 A1 Massimo Rugge A1 Diana Sacchi A1 David Y Graham A1 Robert M Genta YR 2020 UL http://gut.bmj.com/content/69/6/1151.abstract AB