RT Journal Article SR Electronic T1 Reply JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 695 OP 695 DO 10.1136/gut.29.5.695 VO 29 IS 5 A1 Nolan, N P M A1 O'Briain, D S YR 1988 UL http://gut.bmj.com/content/29/5/695.1.abstract AB