SLC6A4 and Werner syndrome: Here, we utilized immunohistochemical methods to determine the density of SERT immunoreactive (SERT-ir) axons in the lateral, basal, accessory basal, and central nuclei of the amygdala in WS and ASD, and we compared these results with our data on SERT-ir axon density in neurotypical (NT) postmortem brains, as previously reported in Lew et al. [33], in order to test the hypothesis that serotonergic chemoarchitecture of targeted amygdaloid nuclei are disrupted in ASD and WS.