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. 2023 Apr 10;13:5808. doi: 10.1038/s41598-023-32275-3

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© The Author(s) 2023

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Result of group analysis of MRI-ASL data. The group averaged cerebral blood flow (CBF) maps (ml/100 g/min) calculated for the post-COVID-19 group (left column) and healthy subjects (middle column). Right column depicts regions that show significant hypoperfusion in post-COVID-19 patients compared to healthy controls (non-parametric permutation test, p < 0.05, FWE-corrected with TFCE). No regions with a significantly higher perfusion in post-COVID-19 patients compared to healthy controls were detected. Images are reported in the 2-mm MNI152 standard space and in radiological convention.