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. 2019 Feb 25;10:151. doi: 10.3389/fneur.2019.00151

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Copyright © 2019 Liu, Li, Luo, He, Chen, Cheng, Zhang and Xie.

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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Forest plot of standardized mean difference of levodopa equivalent doses between STN DBS and GPi DBS. GPi, globus pallidus interna; STN, subthalamic nucleus; IV, inverse variance; CI, confidence interval.