RT Journal Article SR Electronic T1 THURSDAY 14TH SEPTEMBER JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP A21 OP A40 DO 10.1136/gut.37.Suppl_2.A21 VO 37 IS Suppl 2 YR 1995 UL http://gut.bmj.com/content/37/Suppl_2/A21.abstract AB