4-HydroxycoumarinsCoumarinsAnticoagulantsLupus Coagulation InhibitorUmbelliferonesWarfarinProthrombin TimeAcenocoumarolBlood CoagulationProtein CRodenticidesMammeaPartial Thromboplastin TimeApiaceaeInternational Normalized RatioHeparinFactor XaPhenindioneAntithrombinsBlood Coagulation TestsThromboembolismPhenprocoumonThrombin Time