GAD2 and Alzheimer disease: Using GAD65/67 to stain GABAergic cells, no alteration in total counts of cells was seen in the cortex of DLB or AD patients when compared to control in either primary visual (ANOVA: F[2,23] = 0.389, p = 0.682) or secondary visual cortices (ANOVA: F[2,23] = 1.184, p = 0.186; see Additional file 8: Table S4).