highly significantP < 2.2 × 10 –16
When miRNA expression levels were averaged for tissue type across animals within the groups, Spearman’s rank correlations between PBMCs and the brain regions are all highly significant ( r s = 0.47–0.57; P < 2.2 × 10 –16 ), although pairwise correlations among the brain regions are markedly stronger ( r s = 0.86–0.99).