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Retrospective StudiesSurgery Department, HospitalTreatment OutcomeEmergency Service, HospitalHospitals, TeachingHospitals, UniversityHospital DepartmentsHospitals, GeneralHospital CostsHospitals, UrbanNursing Staff, HospitalHospitals, PediatricPostoperative ComplicationsLength of StayProspective StudiesEconomics, HospitalHospitals, DistrictHospital Bed CapacityHospitals, SpecialTime FactorsHospitalizationGeneral SurgeryHospitals, PrivateFinancial Management, HospitalUnited StatesBariatric SurgeryHospital ChargesFollow-Up StudiesHospital PlanningPatient AdmissionRisk FactorsHospital UnitsEmergenciesThoracic SurgeryHospital RecordsOutpatient Clinics, HospitalPatient DischargeHospitals, PsychiatricSurgical Procedures, OperativeCardiac Surgical ProceduresRadiology Department, HospitalEquipment and Supplies, HospitalEmergency Medical ServicesEnglandObstetrics and Gynecology Department, HospitalHospital Bed Capacity, 500 and overInfant, NewbornPostoperative PeriodQuestionnairesHospitals, CountyLibraries, HospitalHospital Information SystemsUnited States Department of Veterans AffairsMedical AuditEmergency TreatmentSurgery, PlasticWounds and InjuriesCross InfectionIncidenceTriagePreoperative CareAge FactorsHospitals, MunicipalOutcome Assessment (Health Care)Risk AssessmentPatient ReadmissionCohort StudiesCoronary Artery BypassLaparoscopySurgical Procedures, ElectivePathology Department, HospitalThoracic Surgery, Video-AssistedFood Service, HospitalCataract ExtractionCardiology Service, HospitalAmbulatory Surgical ProceduresAmerican Hospital AssociationDiagnosis-Related GroupsQuality of Health CareLogistic ModelsEmergency MedicineInpatientsHealth Care SurveysPatient SatisfactionHospitals, VeteransHospitals, ReligiousPrognosisSeverity of Illness IndexReoperationTomography, X-Ray ComputedLaboratories, HospitalSurgery, OralGreat BritainSurgery, Computer-AssistedAcute DiseasePostoperative CareCross-Sectional StudiesMedical RecordsPatient TransferIntraoperative Complications