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Variation in Rates of Hospital Admission from the Emergency Department Among Medicare Patients at the Regional, Hospital, and Physician Levels

Health Care DeliveryHospitalizationMedicare PatientsHealth PolicyEmergency CareEmergency DepartmentPatient SafetyEmergency Department AdministrationOutcomes ResearchEmergency Medical ServicePublic HealthMedicineHospital AdmissionHealth Services ResearchEmergency MedicineHospital Length Of StayHospital Medicine