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 G Van Assche A1 J Verbeeck A1 S Vermeire A1 M Van Ranst A1 P Rutgeerts YR 2008 UL http://gut.bmj.com/content/57/11/1634.1.abstract AB