PD vmDAns were generated from iPSC lines from two PD patients carrying the G2019S mutation in the LRRK2 gene (iPSC lines PD SP12 and PD SP13), whereas Ctrl vmDAns were obtained from two independent iPSC clones (Ctrl SP11 and Ctrl SP11#4) from a healthy age-matched control (see Tables 1, S1, and S2 for a summary of the iPSC lines used). The gene discussed is LRRK2; the disease is Parkinson disease.