Erratum

Erratum: Ngo K, Aker M, Petty LE, Chen J, Cavalcanti F, Nelson AB, Hassin-Baer S, Geschwind MD, Perlman S, Italiano D, Laganà A, Cavallaro S, Coppola G, Below JE, Fogel BL . Expanding the global prevalence of spinocerebellar ataxia type 42. Neurol Genet. 2018 Apr 5;4(3):e232. doi: 10.1212/NXG.0000000000000232