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. 2021 Apr 9;12:640295. doi: 10.3389/fphys.2021.640295

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Copyright © 2021 Zhang, Guo, Xiaokereti, Cao, Li, Sun, Li, Zhou and Tang.

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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Dynamic consecutive changes in LF (A), HF (B), and LF/HF (C) among the three groups at baseline and the 4th, 8th, and 12th week, **P < 0.01 vs. CTRL, ^##P < 0.01 vs. OSA; abbreviations as in Figures 1, 7.