A GWAS conducted in 2019 on DNA samples from28,568 patients with PD identified more than 40 loci reliablyassociated with PD, including SNPs located in the GBA,INPP5F/SCARB2, LRRK2, MCC1, SNCA, VPS13C genes(Blauwendraat et al., 2019). Here, SNCA is linked to Parkinson disease.