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. 2021 May 3;12:631204. doi: 10.3389/fphar.2021.631204

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Copyright © 2021 Lu, Zhang, Guo, Liu, Xu, Hu, Ni, Lu and Zhao.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Pooled relative risk of the 50% migraine responder rate compared with placebo; diamond indicates the estimated relative risk with 95% confidence interval for the pooled patients.