Differential efficacy of non-invasive vagus nerve stimulation for the acute treatment of episodic and chronic cluster headache: A meta-analysis.

de Coo IF, Marin JC, Silberstein SD, Friedman DI, Gaul C, McClure CK, Tyagi A, Liebler E, Tepper SJ, Ferrari MD, Goadsby PJ. Differential efficacy of non-invasive vagus nerve stimulation for the acute treatment of episodic and chronic cluster headache: A meta-analysis. Cephalalgia. 2019 Jul; 39(8):967-977.

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