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Flowchart shows patient selection. Patients with idiopathic intracranial hypertension (IIH) in acute intervention subgroup underwent large-volume diagnostic lumbar puncture after enrollment with closing pressure of less than 250 mm H2O. Patients with IIH in chronic intervention subgroup underwent medical management or venous sinus stenting with resolution or substantial improvement in papilledema. ICP = intracranial pressure.
