Contrast, regression and region of interest analyses in voxel-based morphometry (VBM); all analyses corrected for age, gender, brain matter volume (gray+white matter) and highest level of education achieved.

Contrast between AA/AG vs. GG rs6265; Whole brain regression analysis in allele variation rs6265(AA = 1, AG = 2, GG = 3); Whole brain regression analysis in relation to TMT-B scores; Region of interest regression analysis using hippocampus mask (PickAtlas aal); Region of interest regression analysis using hippocampus mask. BA = Brodmann's Area; MNI Coordinates = x, Saggital plane, y, Coronal plane, z, Axial plane; p* = uncorrected peak level, p**uncorrected cluster level, p***FWE corrected cluster level.