LRRK2 and Parkinson disease: Numerous genes are involved in PD neuropathology, including alpha‐synuclein (α‐Syn), leucine‐rich repeat kinase 2 (LRRK2), glucocerebrosidase (GBA), vacuolar protein sorting associated protein 35 (VPS35), phosphatase homolog‐induced kinase (PINK1), and Parkinson protein 7 (PAPK7).5, 6