RT Journal Article SR Electronic T1 Inflammatory bowel disease JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP S26 OP S27 DO 10.1136/gut.34.3_Suppl.S26 VO 34 IS 3 Suppl YR 1993 UL http://gut.bmj.com/content/34/3_Suppl/S26.abstract AB