This process found out that 9 out of 10 genes (MMP9, RPS11, TUBB2A, EEF2, CFD, DAZAP2, MYL6, ARHGDIB, RPL18, and CD81) identified in the meta-analysis instances have appeared in the literature as related to PD or neurodegenerative conditions. This evidence concerns the gene MMP9 and Parkinson disease.