RT Journal Article SR Electronic T1 Reply JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 574 OP 574 DO 10.1136/gut.34.4.574-a VO 34 IS 4 A1 P Marcellin A1 M Pouteau A1 N Colas Linhart A1 B Bok A1 J-P Benhamou YR 1993 UL http://gut.bmj.com/content/34/4/574.2.abstract AB