LRRK2 and Parkinson disease: CNVs were also absent from all other Mendelian PD genes including PTEN-induced putative kinase (PINK1; PARK6) (Valente et al. 2004), leucine rich repeat kinase 2 (LRRK2; PARK8) (Paisan-Ruiz et al. 2004), and glucocerebrosidase (GBA) (Clark et al. 2007).