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. 2022 Jun 24;19(13):7748. doi: 10.3390/ijerph19137748

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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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Stratified meta-analysis according to cognitive sub-functions. Results are indicated with 95% confidence intervals. Negative Standardized Mean Difference (SMD) indicates a decrease in cognitive functions in COVID-19 patients compared to healthy individuals [22,24,31,34,37].