subgroup analysis disclosed that , in patients with isolated mitral valve replacement , warfarin was superior to both of the psts with respect to the prevention of thromboembolism ( warfarin vs dipyridamole-aspirin , p = .005 ; warfarin vs pentoxifylline-aspirin , p less than .05 ) .
C0732279
dipyridamole-aspirin
C0004057
aspirin