1Carlquist J F,Knight S,Horne B D,Huntinghouse J A,Rollo J S,Muhlestein J B,May H,Anderson J L.Cardiovascular risk among patients on clopidogrel anti-platelet therapy after placement of drug-eluting stents is modified by genetic variants in both the CYP2C19 and ABCB1 genes. Thrombosis and Haemostasis . 2013