ATP13A2 and Parkinson disease: Recent genome-wide association studies [5–7] have identified several genes, including α-synuclein, LRRK2, Parkin, DJ-1, UCHL1, NURR1, PINK1, FBX07, PLA2G6, GIGyF2, GBA, and ATP13A2 (PARK9), that are possibly involved in the neuronal degeneration seen in PD.