UBR4 and Familial paroxysmal ataxia: In a Korean study, where whole exome sequencing was performed in 39 individuals with episodic ataxia, four new possible or probable pathogenic variants in UBR4 [p.(Tyr4877Cys), p.(Arg4111His), p.(Ala5042Val), and p.(Ala2581Val)] have been identified.