The correlation of clinical parameters with ATXN2 repeat length revealed a non-significantly lower median DD and CSDP in the ATXN2 27-30Q group than in the SCA3 MC with ATXN2 16-22Q and ATXN2 23-26Q groups (Fig. 1G-H). The gene discussed is ATXN2; the disease is Machado-Joseph disease.