RT Journal Article SR Electronic T1 Correction JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 1312 OP 1312 DO 10.1136/gut.2008.174516corr1 VO 58 IS 9 YR 2009 UL http://gut.bmj.com/content/58/9/1312.2.abstract AB