Emergency Service, HospitalHospital DepartmentsUnited States Department of Veterans AffairsRadiology Department, HospitalEmergenciesTriageUnited StatesEmergency MedicineUnited States Department of DefenseEmergency Medical ServicesRetrospective StudiesPublic Health AdministrationPathology Department, HospitalWounds and InjuriesEmergency NursingEmergency TreatmentTime FactorsProspective StudiesGovernment AgenciesUrology Department, HospitalUnited States Department of AgriculturePatient AdmissionHospitals, UrbanLocal GovernmentMedical Staff, HospitalEnglandSensitivity and SpecificityCrowdingAnesthesia Department, HospitalChest PainHospitals, UniversityHospitalizationUnited States Dept. of Health and Human ServicesQuestionnairesPopulation SurveillanceMedical AuditOutpatient Clinics, HospitalState GovernmentHospitals, TeachingTreatment OutcomeGreat BritainHealth Services MisuseRisk FactorsObstetrics and Gynecology Department, HospitalInterdepartmental RelationsHealth Care SurveysRadiology Information SystemsData CollectionVeteransAccidentsAmbulatory CareInfant, NewbornSurgery Department, HospitalHospitals, PediatricAcademic Medical CentersAcute DiseaseOntarioPhysical Therapy Department, HospitalEfficiency, OrganizationalLength of StayAge FactorsPublic Health InformaticsPatient DischargeMedical RecordsPsychiatric Department, HospitalUnited States Government AgenciesFollow-Up StudiesGuideline AdherenceCaliforniaDiagnostic ErrorsAmbulancesPoisoningHospitals, GeneralCraniocerebral TraumaUtilization ReviewCross-Sectional StudiesIncidenceNew York CityHospitals, VeteransPublic Health PracticeRisk AssessmentTime and Motion StudiesHealth Services ResearchPoint-of-Care SystemsPediatricsCohort StudiesPatient TransferPractice Guidelines as TopicSeverity of Illness IndexPersonnel, HospitalTomography, X-Ray ComputedRadiographyMilitary MedicineHealth Services AccessibilityPrevalenceHistory, 20th CenturyAge DistributionAttitude of Health PersonnelNuclear Medicine Department, HospitalQuality Assurance, Health Care