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. 2022 May 21;12(5):675. doi: 10.3390/brainsci12050675

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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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Inclusion of subgroups with a literature cut-off value of 4 and subgroups without a cut-off value of 4 in the analysis [4,9,19,20,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36].