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Fig. 1 | The Journal of Headache and Pain

Fig. 1

From: Brain-derived neurotrophic factor in primary headaches

Fig. 1

a Significant increase of brain-derived neurotrophic factor (BDNF) during migraine attacks (ATT) compared with headache-free periods (INT), tension-type headache (TTH), and healthy controls (HC). b Comparison of BDNF levels in 19 patients, for whom paired samples—during migraine attacks (ATT) and headache-free periods (INT)—were available

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