Venous ThromboembolismVenous ThrombosisStockings, CompressionAnticoagulantsInpatientsHospitalizationEconomics, NursingThromboembolismCritical CarePulmonary EmbolismHeparin, Low-Molecular-WeightHospital MortalityCritical IllnessEnoxaparinPatient AdmissionPatient DischargeIntensive Care UnitsLength of StayAcute DiseaseHospitalsHospitals, TeachingHospital CostsHemorrhageProspective StudiesOutcome Assessment (Health Care)Patient ReadmissionRisk FactorsMedical RecordsHeparinGeriatric AssessmentGuideline AdherenceRisk AssessmentEmergency Service, HospitalSeverity of Illness IndexRetrospective StudiesTreatment OutcomeCohort StudiesFollow-Up StudiesQuestionnairesRandomized Controlled Trials as TopicComorbidityUnited StatesReproducibility of ResultsCross-Sectional StudiesTime Factors