RT Journal Article SR Electronic T1 Risk of lymphoma: inflammatory bowel disease and immunomodulators JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 580 OP 581 VO 55 IS 4 A1 Ang, Y S A1 Farrell, R J YR 2006 UL http://gut.bmj.com/content/55/4/580.2.abstract AB