Fig. 1From: Efficacy of erenumab and factors predicting response after 3 months in treatment resistant chronic migraine: a clinical service evaluationviolin plot (a) and before-after individual values plot (b) showing headache days at 3 months compared to baseline. There was a significant reduction in headache days. In (a) dashed line shows median, dotted lines at upper and lower quartiles. ****p < 0.0001 by Wilcoxon matched-pairs signed rank testBack to article page