BDNF and Parkinson disease: Whereas the rs6265 SNP has received the most attention of those reported in the gene BDNF, others are associated with modest hippocampal or whole-brain atrophy, cognitive dysfunction and with potential pharmacogenetic effects on dopamine replacement strategies for PD as well, including the rs908867, rs11030094, rs10501087, rs1157659, and rs1491850 SNPs (11, 14–16).