PPP2R2B and cerebellar ataxia: The expanded repeats were found in these ataxia genes: RFC1 (homozygous), ATN1, ATXN2, ATXN3, ATXN6, FXN (homozygous), NOP56, PPP2R2B. No proband carried the newly identified repeat expansion in GAA-FGF14, THAP11 or ZFHX3.