Bleeding During Treatment with Aspirin Versus Apixaban in Patients with Atrial Fibrillation Unsuitable for Warfarin
Stroke 43:3291-3297, Flaker, G.,et al, 2012
Quality of Anticoagulation Control in Atrial Fibrillation
Lancet 376:935-937, Lane,D.A. &Lip,G.Y.H., 2010