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Relation between (A) the thickness of the interventricular septum (in diastole, r = 0.53, p < 0.005), and (B) left ventricular (LV) mass (r = 0.48, p < 0.01) and the number of GAA repeats on the smaller allele of the frataxin gene in the 45 subjects homozygous for the GAA expansion. The 95% confidence intervals are shown by the dotted lines.
