BST1 and Parkinson disease: Previous research has indicated a genetic correlation between BST1 polymorphism rs4698412 and the predisposition to PD (Chang et al., 2011; Chang et al., 2015; Saad et al., 2011; Satake et al., 2009; Sharma et al., 2012; UK Parkinson’s Disease Consortium et al., 2011).