HDAC2 and Parkinson disease: The minor allele of deletion variant rs5820527 was found to have perfect LD with the PD risk allele of PD GWAS-SNV rs2269906 (r2 = 1, D′ = 1), suggesting that disrupted binding of associated TFs (FOXD3, PAX4, and the TF-DEGs: FOXJ2, FOXJ3, and HDAC2) may contribute mechanistically to PD risk.