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HeadHead and Neck NeoplasmsEmergency Service, HospitalHead MovementsHospital DepartmentsFemur HeadSperm HeadCraniocerebral TraumaHead Injuries, ClosedFemur Head NecrosisUnited States Department of Veterans AffairsRadiology Department, HospitalEmergenciesRetrospective StudiesTriageEmergency MedicineEmergency Medical ServicesUnited StatesUnited States Department of DefensePublic Health AdministrationPathology Department, HospitalWounds and InjuriesProspective StudiesEmergency NursingEmergency TreatmentHead Protective DevicesCarcinoma, Squamous CellTime FactorsPatient AdmissionUnited States Department of AgricultureGovernment AgenciesUrology Department, HospitalHospitals, UrbanLocal GovernmentEnglandMedical Staff, HospitalTreatment OutcomeCrowdingAnesthesia Department, HospitalHospitalizationHospitals, UniversityTomography, X-Ray ComputedQuestionnairesChest PainHumeral HeadUnited States Dept. of Health and Human ServicesMedical AuditPopulation SurveillanceRisk FactorsPediculusSkull FracturesOutpatient Clinics, HospitalHospitals, TeachingInfant, NewbornFollow-Up StudiesAccidentsLice InfestationsGreat BritainState GovernmentHealth Services MisuseObstetrics and Gynecology Department, HospitalInjury Severity ScoreSurgery Department, HospitalInterdepartmental RelationsTrauma Severity IndicesHealth Care SurveysRadiology Information SystemsVeteransHospitals, PediatricData CollectionLength of StayAge FactorsOntarioAcademic Medical CentersAccidents, TrafficAcute DiseasePhysical Therapy Department, HospitalIncidenceAmbulatory CareSensitivity and SpecificityPatient DischargeEfficiency, OrganizationalMedical RecordsGuideline AdherencePublic Health InformaticsPsychiatric Department, HospitalUnited States Government AgenciesDiagnostic ErrorsHospitals, GeneralUtilization ReviewCross-Sectional StudiesNew York CityAmbulancesPractice Guidelines as TopicCaliforniaCohort StudiesRisk AssessmentPublic Health PracticeNeckHospitals, Veterans