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Emergency Service, HospitalHospital DepartmentsHospitals, TeachingHospitals, UniversityHospitals, GeneralHospitals, UrbanRetrospective StudiesHospital CostsHospitals, PediatricNursing Staff, HospitalUnited StatesRadiology Department, HospitalEconomics, HospitalHospitalizationHospitals, DistrictHospitals, SpecialLength of StayHospital Bed CapacityUnited States Department of Veterans AffairsEmergenciesProspective StudiesPatient AdmissionEmergency Medical ServicesTriageHospitals, PrivateOutpatient Clinics, HospitalFinancial Management, HospitalTime FactorsSurgery Department, HospitalHospital ChargesWounds and InjuriesEmergency MedicineHospital UnitsPatient DischargeHospital PlanningPathology Department, HospitalObstetrics and Gynecology Department, HospitalEquipment and Supplies, HospitalHospital RecordsTertiary Care CentersEnglandRisk FactorsUnited States Department of DefensePublic Health AdministrationHospitals, PsychiatricEmergency TreatmentInfant, NewbornHospital Bed Capacity, 500 and overMedical AuditHospital Information SystemsTrauma CentersQuestionnairesEmergency NursingHealth Care SurveysFollow-Up StudiesHospitals, CountyIncidenceLibraries, HospitalUrology Department, HospitalGreat BritainCross-Sectional StudiesAge FactorsCross InfectionQuality of Health CarePatient TransferHospitals, MunicipalHospitals, VeteransPsychiatric Department, HospitalData CollectionAnesthesia Department, HospitalOutcome Assessment (Health Care)Medical RecordsCohort StudiesUtilization ReviewPatient ReadmissionHealth Services ResearchPopulation SurveillanceLaboratories, HospitalGerminal CenterAcute DiseaseDiagnosis-Related GroupsGovernment AgenciesGuideline AdherenceAmbulatory CareCardiology Service, HospitalHealth Services MisuseInpatientsPrevalenceCrowdingCosts and Cost AnalysisLogistic ModelsChild Day Care CentersFood Service, HospitalLocal GovernmentHospitals, ReligiousQuality Assurance, Health CareCenters for Disease Control and Prevention (U.S.)United States Department of AgricultureCommunity Health CentersChest Pain