ATP1A3 and Ataxia: In addition to the variants identified in SCN2A, ATP1A3, and KCNA1 in the ataxia-gene panel discussed above, 4 highly suggestive candidate variants (n = 4/7) in the CLCN1, p.Gly945ArgfsX39; CACNA1E, p.Ile614Val; SCN1B, p.Cys121Trp; and SCN9A, p.Tyr1217Ter genes were identified.