4-HydroxycoumarinsAnticoagulantsCoumarinsWarfarinFactor XaInternational Normalized RatioHeparinBlood CoagulationThrombinPlatelet Aggregation InhibitorsLupus Coagulation InhibitorUmbelliferonesProthrombin TimeAcenocoumarolProtein CRodenticidesMammeaPartial Thromboplastin TimeApiaceaePhenindioneAntithrombinsBlood Coagulation TestsThromboembolismPhenprocoumonThrombin Time