Fig. 4From: Reduced mitochondrial D-loop methylation levels in sporadic amyotrophic lateral sclerosisD-loop region methylation levels (a) and mtDNA copy number (b) in controls (n = 51) and ALS patients (n = 63). Data are expressed as means ± SD. Statistical analysis was performed by means of ANCOVA including age at sampling and sex as covariates. **p < 0.01Back to article page