RT Journal Article SR Electronic T1 Rigler on the roof JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 798 OP 798 DO 10.1136/gut.2006.110015 VO 57 IS 6 A1 J Simpson A1 D J Humes A1 E J O’Rourke A1 P D James A1 A G Acheson YR 2008 UL http://gut.bmj.com/content/57/6/798.abstract AB