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. 2021 Oct 28;13:746797. doi: 10.3389/fnagi.2021.746797

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Copyright © 2021 Liu, Liu, Liu, Rao, Wang, Wang, Gong and Wen.

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 UPDRS III according to the subgroups of tDCS session. CI, confidence intervals; SD, standard deviation; tDCS, transcranial direct current stimulation; UPDRS, Unified Parkinson's Disease Rating Scale.