Cite
MLA Citation
Ilse F de Coo et al.. “Differential efficacy of non-invasive vagus nerve stimulation for the acute treatment of episodic and chronic cluster headache: A meta-analysis.” Cephalalgia, vol. 39, 2019, pp. 967–977. http://access.bl.uk/ark:/81055/vdc_100089532353.0x00002d