Fig. 4From: A two years open-label prospective study of OnabotulinumtoxinA 195 U in medication overuse headache: a real-world experienceComparison of the mean change in HIT-6 score in the OnabotulinumtoxinA 155 U and 195 U treated groups. *p ≤ 0.002. **p < 0.05Back to article page