Association of brain-derived neurotrophic factor and nerve growth factor gene polymorphisms with susceptibility to migraine.

However, the frequency of minor A alleles of rs6265 in BDNF gene was borderline significant in the patients compared with the healthy controls ( P =0.049; odds ratios [ORs] [95% confidence intervals {CIs}] =0.723 [0.523–0.999]).

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