Hospitals, TeachingPatient AdmissionHospitals, UniversityHospitalizationHospitals, GeneralHospital CostsLength of StayRetrospective StudiesHospitals, UrbanEmergency Service, HospitalHospitals, PediatricNursing Staff, HospitalTeaching MaterialsHospital Bed CapacityHospitals, DistrictEconomics, HospitalHospitals, SpecialHospitals, PsychiatricProspective StudiesHospitals, PrivateEducation, Medical, UndergraduateHospital DepartmentsPatient DischargeHospital ChargesHospital UnitsFinancial Management, HospitalIntensive Care UnitsTime FactorsEnglandPatient ReadmissionTeaching RoundsHospital RecordsHospital PlanningEducation, MedicalHospital Bed Capacity, 500 and overRisk FactorsInpatientsUnited StatesSurgery Department, HospitalInfant, NewbornCross InfectionBed OccupancyEmergenciesClinical CompetenceEducational MeasurementDiagnosis-Related GroupsNigeriaOutpatient Clinics, Hospital