The cortical gray matter volume of each hemisphere was analyzed by FreeSurfer (version 7.1.0)1 using the recon-all command. Briefly, this procedure includes motion correction, removal of non-brain tissue, Talairach transformation, segmentation of the gray and white matter structures, intensity normalization, and cortical parcelation (Fischl and Dale, 2000; Fischl, 2004; Reuter et al., 2012).
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