RT Journal Article SR Electronic T1 Response to letter to the editor by Moayyedi et al JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 1721 OP 1722 DO 10.1136/gutjnl-2018-317127 VO 68 IS 9 A1 Ka-Shing Cheung A1 Wai Keung Leung YR 2019 UL http://gut.bmj.com/content/68/9/1721.abstract AB