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. 2019 Jun 5;10:598. doi: 10.3389/fneur.2019.00598

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Copyright © 2019 An, Liang, Lee, Lee, Chen, Tsai, Lin, Lin and Yang.

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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PSS total score stratified by migraine frequency (A) and the comparison was further stratified by sex (B). The middle horizontal line represents the mean and the error bars represent 95% confidence interval around the means. PSS, Perceived Stress Scale.