Hospitals, TeachingNigeriaHospitals, UniversityHospitals, GeneralHospital CostsTeaching MaterialsHospitals, UrbanNursing Staff, HospitalEconomics, HospitalHospitals, PediatricRetrospective StudiesHospital Bed CapacityHospitals, PrivateHospitals, SpecialEducation, Medical, UndergraduateHospitals, DistrictLength of StayFinancial Management, HospitalEmergency Service, HospitalQuestionnairesHospital DepartmentsHospitalizationHospital ChargesTeaching RoundsHospitals, PsychiatricEducation, MedicalHospital PlanningCross-Sectional StudiesHospital UnitsHospital RecordsEquipment and Supplies, HospitalClinical CompetenceProspective Studies