RT Journal Article SR Electronic T1 Authors’ response JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 1634 OP 1634 VO 57 IS 11 A1 Van Assche, G A1 Verbeeck, J A1 Vermeire, S A1 Van Ranst, M A1 Rutgeerts, P YR 2008 UL http://gut.bmj.com/content/57/11/1634.1.abstract AB