RT Journal Article SR Electronic T1 Addition of omeprazole to dual antiplatelet therapy with clopidogrel plus aspirin lowers the risk of upper gastrointestinal bleeding JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 144 OP 145 DO 10.1136/ebm1304 VO 16 IS 5 A1 Siller-Matula, Jolanta M A1 Delle-Karth, Georg YR 2011 UL http://ebm.bmj.com/content/16/5/144.abstract AB