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Showing articles 0 to 2 of 2 Filter Applied: headache,intractable (Click to remove) Intravenous Dihydroergotamine for Inpatient Management of Refractory Primary Headaches Neurol 77:1827-1832, Nagy, A.J.,et al, 2011 Case 38-2009: A 16-Year-Old Boy with Paroxysmal Headaches and Visual Changes NEJM 361:2367-2378, Brass,S.,et al, 2009 Showing articles 0 to 2 of 2