Venous ThromboembolismThromboembolismPulmonary EmbolismVenous ThrombosisAnticoagulantsHeparin, Low-Molecular-WeightThrombophiliaThrombophlebitisWarfarinHemorrhageFibrin Fibrinogen Degradation ProductsEnoxaparinStockings, CompressionRisk FactorsFactor VVena Cava FiltersHeparinIntermittent Pneumatic Compression DevicesInternational Normalized RatioRecurrenceProthrombinFibrinolytic AgentsVitamin KIncidenceThrombosisActivated Protein C ResistanceContraceptives, Oral, CombinedPostoperative ComplicationsDalteparinEmbolectomyAtrial FibrillationRisk AssessmentProtein C DeficiencyProspective StudiesPregnancy Complications, HematologicRetrospective StudiesBandagesTreatment OutcomePhlebographyPostthrombotic SyndromeProtein S DeficiencyPregnancy Complications, CardiovascularAcenocoumarolDesogestrelBlood Coagulationbeta-AlanineThiophenesAndrostenesFollow-Up StudiesFactor XaLevonorgestrelContraceptives, OralPractice Guidelines as TopicNeoplasmsRiskGravity SuitsCohort StudiesAdministration, OralAustriaNorpregnenesContraceptives, Oral, SyntheticTime FactorsAntithrombin III DeficiencyImmobilizationArthroplasty, Replacement, KneeInjections, SubcutaneousAtrial AppendageCompression BandagesProtein CAspirinPyridonesAerospace MedicineEchocardiography, TransesophagealAcute DiseaseVascular NeoplasmsThrombectomyAntithrombinsIntracranial Embolism and ThrombosisCase-Control StudiesBlood Coagulation FactorsHeart Valve ProsthesisPuerperal DisordersHospitalizationPartial Thromboplastin TimeIntracranial ThrombosisStrokeArthroplasty, Replacement, HipAntiphospholipid SyndromeFemoral VeinBlood Coagulation TestsFactor VIIIPremedicationRandomized Controlled Trials as TopicBlood Coagulation DisordersAntithrombin IIIPlatelet Aggregation InhibitorsInpatientsAntibodies, AntiphospholipidThrombolytic TherapyDouble-Blind Method