KIAA0319 and Parkinson disease: Notably, alterations in <i>KIAA0319</i>, a gene involved in neuronal migration, synaptic formation, and cortical development, have previously been associated with Parkinson's disease at the gene expression level, while methylation changes in <i>FAM50B</i> have been reported in neurotoxic and cognitive contexts; our data suggest, for the first time, a potential epigenetic involvement of both genes in Parkinson's disease.