Hospitals, TeachingPatient AdmissionHospitals, UniversityHospitalizationHospitals, GeneralHospital CostsLength of StayRetrospective StudiesHospitals, UrbanEmergency Service, HospitalHospitals, PediatricNursing Staff, HospitalTeaching MaterialsHospital Bed CapacityHospitals, DistrictEconomics, HospitalHospitals, SpecialProspective StudiesHospitals, PsychiatricHospitals, PrivateEducation, Medical, UndergraduateHospital DepartmentsPatient DischargeHospital ChargesHospital UnitsTime FactorsFinancial Management, HospitalIntensive Care UnitsEnglandPatient ReadmissionRisk FactorsTeaching RoundsHospital RecordsHospital PlanningEducation, MedicalHospital Bed Capacity, 500 and overUnited StatesInpatientsSurgery Department, HospitalInfant, NewbornHistocompatibility Antigens Class ICross InfectionEmergenciesEducational MeasurementBed OccupancyClinical CompetenceDiagnosis-Related GroupsNigeriaQuestionnairesOutpatient Clinics, HospitalStudents, MedicalAcute Disease