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. 2021 Sep 10;15:720596. doi: 10.3389/fnhum.2021.720596

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Copyright © 2021 Niu, Li, Zhang, Sun, Sun, Shu, Wang, Zhang, Chen and Wang.

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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Typical predominant magnetic source locations in the 1–500 Hz frequency range before and after treatment. Activation of the PCC in the 30–80 Hz frequency band increased after treatment, which is indicated by green arrows.