BST1 and Parkinson disease: Recently, genome-wide association studies and meta-analyses for PD identified intronic single-nucleotide polymorphisms (SNPs) in the CD157/BST1 gene on the human chromosome 4p15 as a new susceptibility locus in Asian and European populations (Satake et al., 2009; Tan et al., 2010; Liu et al., 2011, 2013b; International Parkinson Disease Genomics Consortium et al., 2011; Saad et al., 2011; Simón-Sánchez et al., 2011; UK Parkinson’s Disease Consortium et al., 2011; Zimprich, 2011; Lill et al., 2012; Sharma et al., 2012).