SLC6A3 and Progressive cerebellar ataxia: Interestingly, among the three hereditary progressive ataxia genes that overlapped with our meta-DEG gene set, mutations in ATXN10 were reported to present with levodopa-responsive parkinsonism, or reduction of dopamine transporter binding, as documented by 99mTc-TRODAT-1 SPECT (Schüle et al., 2017; Fabiani et al., 2019), although these findings were not included in the OMIM database.