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Applying the International Classification of Headache Disorders to the Emergency Department: An Assessment of Reproducibility and the Frequency With Which a Unique Diagnosis Can Be Assigned to Every Acute Headache Presentation

Cluster HeadacheEmergency CareMedicinePatient SafetyDiagnosisIntracranial PressureHeadache DisordersNeurologyRapid Trauma AssessmentStrokeInternational ClassificationEmergency DepartmentEmergency Medicine