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. 2023 Jun 30;13(7):1014. doi: 10.3390/brainsci13071014

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© 2023 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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End-of-treatment (week 4) rs–fMRI brain scan images (left caudate as the seed region). Two-sample t test. GRF correction (voxel-level p < 0.010, cluster-level p < 0.050). rs–fMRI = resting-state functional magnetic resonance imaging. z values are represented by the colour bars. A = anterior. L = left. S = superior. IFG = inferior frontal gyrus. (A) Combination [oral vitamin A in combination with olfactory training (OT)] group versus standard care (OT alone) group. (B) Combination group versus control (clinical observation) group. (C) Standard care group versus control group.