RT Journal Article SR Electronic T1 Audit JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP S31 OP S31 DO 10.1136/gut.33.1_Suppl.S31 VO 33 IS 1 Suppl YR 1992 UL http://gut.bmj.com/content/33/1_Suppl/S31.abstract AB