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Retrospective StudiesSurgery Department, HospitalTreatment OutcomeEmergency Service, HospitalHospital DepartmentsHospitals, TeachingHospitals, UniversityHospitals, GeneralHospitals, UrbanHospital CostsProspective StudiesHospitals, PediatricLength of StayNursing Staff, HospitalPostoperative ComplicationsUnited StatesRadiology Department, HospitalTime FactorsEmergenciesHospitals, DistrictHospitalizationEconomics, HospitalHospital Bed CapacityHospitals, SpecialUnited States Department of Veterans AffairsPatient AdmissionEmergency Medical ServicesGeneral SurgeryFollow-Up StudiesHospitals, PrivateTriageFinancial Management, HospitalRisk FactorsOutpatient Clinics, HospitalHospital ChargesPatient DischargeHospital UnitsBariatric SurgeryEnglandHospital PlanningEmergency MedicineWounds and InjuriesEmergency TreatmentPathology Department, HospitalObstetrics and Gynecology Department, HospitalHospital RecordsQuestionnairesEquipment and Supplies, HospitalThoracic SurgeryInfant, NewbornMedical AuditUnited States Department of DefenseSurgical Procedures, OperativeHospitals, PsychiatricPublic Health AdministrationHospital Bed Capacity, 500 and overCardiac Surgical ProceduresHospital Information SystemsIncidenceAge FactorsRisk AssessmentOutcome Assessment (Health Care)Hospitals, CountyCohort StudiesEmergency NursingHealth Care SurveysGreat BritainPostoperative PeriodUrology Department, HospitalPatient ReadmissionHospitals, VeteransLibraries, HospitalAnesthesia Department, HospitalAcute DiseaseCross InfectionHospitals, MunicipalLogistic ModelsQuality of Health CareMedical RecordsPatient SatisfactionSeverity of Illness IndexCardiology Service, HospitalTomography, X-Ray ComputedUtilization ReviewPsychiatric Department, HospitalData CollectionCross-Sectional StudiesPreoperative CarePatient TransferDiagnosis-Related GroupsHealth Services ResearchAcademic Medical CentersSurgery, PlasticHealth Services MisuseGuideline AdherenceLaboratories, HospitalPrognosisPopulation SurveillanceAmbulatory CareLaparoscopy