Extracranial injections of botulinum neurotoxin type A inhibit intracranial meningeal nociceptors' responses to stimulation of TRPV1 and TRPA1 channels: Are we getting closer to solving this puzzle? - Zhang X; Strassman AM; Novack V; Brin MF; Burstein R (Cephalalgia : an international journal of headache, 2016)