In contrast to our findings, the specific G2019S PD-associated LRRK2 mutation has generally been found to result in a progressive reduction of neurite length and branching (West et al., 2005; Greggio et al., 2006; MacLeod et al., 2006; Smith et al., 2006; Plowey et al., 2008; Chan et al., 2011; Nguyen et al., 2011; Winner et al., 2011; Sanchez-Danes et al., 2012; Cherra et al., 2013; Reinhardt et al., 2013; Dagda et al., 2014; Qing et al., 2017), due to an increase in kinase activity (with one exception demonstrating non-impaired neurite morphology (Dachsel et al., 2010)). The gene discussed is LRRK2; the disease is Parkinson disease.