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The figure shows the nominal (uncorrected) p-values (in −log10) at each base pair location for all SNPs evaluated for association with PTSD in the discovery (filled circles) and replication (open circles) samples. The four SNPs that were significant after permutation testing in the discovery sample and the most significant SNP in the replication sample are identified, as is rs6280, a commonly studied DRD3 polymorphism.
