title: Warfarin to prevent thromboembolism in chronic atrial fibrillation.
mesh_terms: D001241:Aspirin / Q000627:therapeutic use; D001281:Atrial Fibrillation / Q000150:complications*; D002908:Chronic Disease; D002986:Clinical Trials as Topic; D006801:Humans; D013923:Thromboembolism / Q000517:prevention & control*; D014859:Warfarin / Q000627:therapeutic use*
chemical_list: D014859:Warfarin; D001241:Aspirin