Calcitonin gene-related peptide causes migraine aura.

"Declarations Ethics approval and consent to participateThe study protocol was approved by the ethics committee of Capital Region, Denmark, and and written informed consent was obtained from all participants. Competing interestsHA reports receiving personal fees from Teva outside of the submitted work. HS reports receiving personal fees from AbbVie, Teva, Lundbeck, Novartis, Eli Lilly, outside of the submitted work. FMA reports receiving personal fees from Pfizer, Teva, Lundbeck, Novartis, and Eli Lilly outside of the submitted work. MA reports receiving personal fees from AbbVie, Amgen, Eli Lilly, GlaxoSmithKline, Lundbeck, Novartis, Pfizer, and Teva Pharmaceuticals outside of the submitted work. MA also serves as an associate editor of Cephalalgia, an associate editor of The Journal of Headache and Pain, and an associate editor of Brain. The remaining authors report no competing interests. Competing interests HA reports receiving personal fees from Teva outside of the submitted work. HS reports receiving personal fees from AbbVie, Teva, Lundbeck, Novartis, Eli Lilly, outside of the submitted work. FMA reports receiving personal fees from Pfizer, Teva, Lundbeck, Novartis, and Eli Lilly outside of the submitted work. MA reports receiving personal fees from AbbVie, Amgen, Eli Lilly, GlaxoSmithKline, Lundbeck, Novartis, Pfizer, and Teva Pharmaceuticals outside of the submitted work. MA also serves as an associate editor of Cephalalgia, an associate editor of The Journal of Headache and Pain, and an associate editor of Brain. The remaining authors report no competing interests."

"Funding Open access funding provided by Royal Library, Copenhagen University Library This study was funded by a research grant from the Lundbeck Foundation (R310-2018-3711)."

"Trial registration ClinicalTrials.gov Identifier: NCT04592952."