WarfarinAnticoagulantsVitamin K Epoxide ReductasesHemorrhageProthrombin TimeAtrial FibrillationThromboembolismMixed Function Oxygenasesbeta-AlanineVitamin KAryl Hydrocarbon HydroxylasesRodenticidesPharmacogeneticsStrokeAspirinVitamin K 1Drug MonitoringDrug InteractionsDrug Dosage Calculations4-HydroxycoumarinsIntracranial HemorrhagesBenzimidazolesBlood CoagulationEmbolismRisk FactorsTreatment OutcomeAdministration, OralVenous ThrombosisHerb-Drug InteractionsPlatelet Aggregation InhibitorsThrombosisDose-Response Relationship, DrugRetrospective StudiesCarbon-Carbon LigasesThrombophlebitisRodent ControlAcenocoumarolGenotypeVitamin K DeficiencyTime FactorsProspective StudiesPhenylbutazoneVenous ThromboembolismHeparin, Low-Molecular-WeightPyridonesFollow-Up StudiesAtrial Appendage