RT Journal Article SR Electronic T1 Reply JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 696 OP 696 DO 10.1136/gut.29.5.696 VO 29 IS 5 A1 Holdsworth, C D A1 Rao, S S C A1 Read, N W YR 1988 UL http://gut.bmj.com/content/29/5/696.1.abstract AB