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. 2022 Jul 21;12(7):956. doi: 10.3390/brainsci12070956

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© 2022 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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(A) Sub-group analysis of peak-to-peak amplitude based on age [8,11,13,15,16,17,23,24,26,27]; (B) sub-group analysis of P15 latency based on age [7,8,11,23]; (C) sub-group analysis of peak-to-peak amplitude based on Hoehn and Yahr stage [8,11,13,15,23,26,27].