RT Journal Article SR Electronic T1 Protective effects of Helicobacter pylori for IBD are related to the cagA-positive strain JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 393 OP 394 DO 10.1136/gutjnl-2017-313805 VO 67 IS 2 A1 Lord, A R A1 Simms, L A A1 Hanigan, K A1 Sullivan, R A1 Hobson, P A1 Radford-Smith, G L YR 2018 UL http://gut.bmj.com/content/67/2/393.abstract AB