WarfarinAnticoagulantsVitamin K Epoxide ReductasesProthrombin TimeHemorrhageAtrial FibrillationThromboembolismMixed Function Oxygenasesbeta-AlanineVitamin KAryl Hydrocarbon HydroxylasesPhysiciansMedical Staff, HospitalRodenticidesPharmacogeneticsPhysician-Patient RelationsStrokeDrug MonitoringAttitude of Health PersonnelVitamin K 1AspirinFamily PracticeDrug InteractionsDrug Dosage Calculations4-HydroxycoumarinsPhysician ImpairmentGreat BritainIntracranial HemorrhagesBenzimidazolesBlood CoagulationQuestionnairesPhysician's Practice PatternsEmbolismHerb-Drug InteractionsClinical CompetencePhysician's RoleAdministration, OralEnglandTreatment OutcomePhysicians, FamilyVenous ThrombosisCarbon-Carbon LigasesRodent ControlAcenocoumarolPlatelet Aggregation InhibitorsThrombosisThrombophlebitisVitamin K DeficiencyRisk FactorsDose-Response Relationship, DrugPatient SatisfactionEthics, MedicalRetrospective StudiesPhenylbutazoneVenous ThromboembolismHeparin, Low-Molecular-WeightPyridones