RT Journal Article SR Electronic T1 Reply JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 140 OP 141 DO 10.1136/gut.30.1.140-a VO 30 IS 1 A1 Rogers, J A1 Levy, D M A1 Henry, M M A1 Misiewicz, J J YR 1989 UL http://gut.bmj.com/content/30/1/140.2.abstract AB