SCA4: Correlation of age of onset and ZFHX3 repeat length
Background: Four reports, published in the form of pre-prints or peer-reviewed articles, have recently described that spinocerebellar ataxia type 4 (SCA4) is caused by expansion of GGC repeats in exon 10 of ZFHX3 . None of the independent reports have definitely established if longer repeats are associated with earlier disease onset.Methods: We compiled clinical and genetic data from all four publ