RT Journal Article SR Electronic T1 Reply JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 152 OP 153 DO 10.1136/gut.36.1.152-c VO 36 IS 1 A1 M Hobsley YR 1995 UL http://gut.bmj.com/content/36/1/152.4.abstract AB