Clopidogrel plus aspirin versus oral anticoagulation for atrial fibrillation in the Atrial fibrillation Clopidogrel Trial with Irbesartan for prevention of Vascular Events (ACTIVE W): a randomised controlled trial - Connolly, S; Pogue, J; Hart, R; ACTIVE Writing Group of the ACTIVE Investigators (Lancet, 2006)
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