GBA1 and Parkinson disease: In a study by Guo et al. 10 in Central South of Mainland China, sixteen Single-Nucleotide Polymorphisms (SNPs) located in the 8 genes and/or loci (SNCA, LRRK2, MAPT, GBA, HLA-DR, BST1, PARK16, and PARK17) were analysed in a cohort of 1061 PD, and 1066 Normal healthy participants.