RT Journal Article SR Electronic T1 Digest JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP i OP ii DO 10.1136/gut.2010.215038 VO 59 IS 5 A1 Emad El-Omar A1 Severine Vermeire A1 Alexander Gerbes YR 2010 UL http://gut.bmj.com/content/59/5/i.abstract AB