title: Prevention of stroke in atrial fibrillation.
mesh_terms: D001241:Aspirin / Q000627:therapeutic use; D001281:Atrial Fibrillation / Q000150:complications*; D002561:Cerebrovascular Disorders / Q000517:prevention & control*; D006801:Humans; D014859:Warfarin / Q000627:therapeutic use
chemical_list: D014859:Warfarin; D001241:Aspirin