PRKN and Parkinson disease: Increased susceptibility to death for DA neurons derived from hESCs overexpressing the α-synudein Increased susceptibility to death for LRRK2-PD-iPSC-derived neurons when exposed to oxidative stress, proteasome inhibitor MG-132 and 6-hydroxydopamine Impairment of mitochondrial parkin recruitment and mitochondrial dysfuntion in PIMK1-PD-iPSC-derived DA neurons