a trend was evident toward a reduction in thromboembolism in the warfarin plus dipyridamole group ( 2 of 181 [ 1 % ] , or 0.5/100 patient-years ) as compared with warfarin plus aspirin ( 7 of 170 [ 4 % ] , or 1.8/100 patient-years ) , or warfarin alone ( 6 of 183 [ 4 % ] , or 1.2/100 patient-years ) .
C0040038
thromboembolism
C0043031
warfarin