cg19789466 (OAS1) was also observed to be differentially methylated in the prefrontal neuronal cells of depressed participants compared with controls (p = 0.0495) in a publicly-available dataset from a previous study [i.e., (33)], providing further evidence that this CpG site may be associated with risk for depression and/or suicidal thoughts and behaviors. This evidence concerns the gene OAS1 and major depressive disorder.