RT Journal Article SR Electronic T1 Risks and benefits of combining immunosuppressives and biological agents in inflammatory bowel disease: is the synergy worth the risk? JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 1181 OP 1183 DO 10.1136/gut.2006.115980 VO 56 IS 9 A1 Hanauer, Stephen B YR 2007 UL http://gut.bmj.com/content/56/9/1181.abstract AB