Histograms of expression quantitative trait loci enrichment analyses for Spect|All analyses. The gray histogram distributions represent the null distribution created by 1,000 lists of randomly ascertained SNPs drawn from the 1 M array platform and conditioned on minor allele frequency. The black dot represents the actual count of SNPs annotated as eQTL present in each tissue in the Spectrum|All Ancestry analysis. We observed significant enrichment of parietal (P <0.004) and cerebellar (P <0.003) eQTL, but not LCL eQTL (P <0.502). eQTL: expression quantitative trait loci; LCL: lymphoblastoid cell line; SNP: single nucleotide polymorphism.