RT Journal Article SR Electronic T1 Factors affecting outcomes in Crohn's disease over 15 years JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 1140 OP 1145 DO 10.1136/gutjnl-2011-301971 VO 61 IS 8 A1 Jacques Cosnes A1 Anne Bourrier A1 Isabelle Nion-Larmurier A1 Harry Sokol A1 Laurent Beaugerie A1 Philippe Seksik YR 2012 UL http://gut.bmj.com/content/61/8/1140.abstract AB