PT - JOURNAL ARTICLE AU - Lopes, Renato D AU - Garcia, David A TI - In people with atrial fibrillation unsuitable for warfarin, apixaban reduces the risk of stroke compared with aspirin, with no difference in major bleeding AID - 10.1136/ebm.2011.0023 DP - 2011 Dec 01 TA - Evidence Based Medicine PG - 187--188 VI - 16 IP - 6 4099 - http://ebm.bmj.com/content/16/6/187.short 4100 - http://ebm.bmj.com/content/16/6/187.full SO - Evid Based Med2011 Dec 01; 16