Forest plot of rs7320847 SNP in SORCS2 for association with ATV hair level. Each point represents the estimated effect size for the rs7320847, A allele, transformed to the linear scale (using the function exp(linear regression beta) for its calculation) for each stratum of the analysis (AA, African American; WT, White; HIS, Hispanic). “Meta-GWAS” refers to the meta-analysis of the discovery cohorts, whereas “Replication” refers to the 79 multi-ethnic subjects analyzed separately. The bars indicate 95% confidence intervals.