PRKN and autism spectrum disorder: Genome-wide association studies (GWAS) highlighted the association between autism and genes, from rare ones, such as PARK2 (Yin et al., 2016), to those which are more common, like SHANK3 (Nemirovsky et al., 2015; Sanders et al., 2015; Guo et al., 2017), FOXP1, FHIT, (The Autism Spectrum Disorders Working Group of The Psychiatric Genomics Consortium, 2017) and independent polymorphisms, like rs57709857-A (The Autism Spectrum Disorders Working Group of The Psychiatric Genomics Consortium, 2017).