patients who did not receive warfarin had a greater risk of thromboembolism ( 2 of 10 [ 20 % ] , or 12 per 100 patient-years , vs 0 of 20 [ 0 % ] , or 0 per 100 patient-years , p less than 0.05 ) .
C0043031
warfarin
C0040038
thromboembolism