PT - JOURNAL ARTICLE ED - , TI - Review: azathioprine, infliximab, certolizumab, and adalimumab are effective for maintaining remission in Crohn’s disease AID - 10.1136/ebm.13.4.115 DP - 2008 Aug 01 TA - Evidence Based Medicine PG - 115--115 VI - 13 IP - 4 4099 - http://ebm.bmj.com/content/13/4/115.short 4100 - http://ebm.bmj.com/content/13/4/115.full SO - Evid Based Med2008 Aug 01; 13