GSTM1 and autosomal dominant cerebellar ataxia: As expected, children with SCA were anemic compared to Controls, with lower red blood cell (RBC) count (3.1 ± 0.6 vs 4.6 ± 0.3 1012 cells/L, p < 0.0001) and hemoglobin (Hb) concentration (8.8 ± 1.0 vs 12.6 ± 0.6 g/dl, p < 0.0001).