ATXN2 and cerebellar ataxia: This study involved six genes (ATXN1, ATXN3, ATXN7, HTT, NOP56, and PPP2R2B), while a higher detection rate has been reported in a spinocerebellar ataxia cohort (4.4%, 22/498) [10], which included five genes (ATXN2, ATXN3, NOP56, AR and HTT).