RT Journal Article SR Electronic T1 Reply JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 576 OP 576 DO 10.1136/gut.34.4.576 VO 34 IS 4 A1 D M Bradburn A1 M Rhodes YR 1993 UL http://gut.bmj.com/content/34/4/576.1.abstract AB