In the summary “CYP2C19 and Clopidogrel: Don't Order That Test Just Yet,” published online August 30, 2010, the first sentence of the Comment should have read, “These findings indicate that CYP2C19 genotype does not influence the effectiveness of clopidogrel in comparison to placebo or ticagrelor; whether genotype influences the effectiveness of clopidogrel compared with prasugrel remains unknown.” The corrected version now appears on our website.
We apologize for the error.