SNCA and Parkinson disease: Yet consistently with the late onset of disease, the DAn cells from PD patients developed specific neurodegenerative phenotypes upon long‐term culture (75‐days) including impaired axonal outgrowth, deficient autophagic vacuole clearance, and accumulation of α‐synuclein (SNCA) (Sanchez‐Danes et al, 2012b; Orenstein et al, 2013).