Although this was observed for IL-5, IL-15, and MIG in SN, and IL-2, TNF-α, IL1-RA, IL-15, and IFN-γ in striatum (Figures 2, 3), a clear increase in the number of PD samples having higher positive values was apparent, confirming the changes in these cytokines in the diseased samples. This evidence concerns the gene IL2 and Parkinson disease.