Pilot study of sphenopalatine injection of onabotulinumtoxinA for the treatment of intractable chronic migraine.

Bratbak DF, NordgÄrd S, Stovner LJ, Linde M, Dodick DW, Aschehoug I, Folvik M, Tronvik E. Pilot study of sphenopalatine injection of onabotulinumtoxinA for the treatment of intractable chronic migraine. Cephalalgia. 2017 Apr; 37(4):356-364.

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