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Cluster exhibiting significantly decreased partial volume‐corrected CBF in the COVID‐19 group (n = 39) relative to controls (n = 11), after adjusting for age and sex. The cluster‐extent threshold was 237 voxels. No clusters were found where the COVID‐19 group had higher CBF compared to controls. Statistical maps are presented in radiological convention. Montreal Neurological Institute coordinates are denoted by z values. R = right; L = left
