Jamtoy KA, Thorstensen WM, Stovner LJ, Rosen A, et al. Onabotulinum toxin A block of the sphenopalatine ganglion in patients with
persistent idiopathic facial pain: a randomized, triple-blind,
placebo-controlled, exploratory, cross-over study. Cephalalgia 2023;43:3331024231187132.
PMID: 37435807