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Risk allele homozygotes (AA) have prefrontal cortical inefficiency (greater activity) during the N-back working memory task (p<0.001 whole brain analysis; 88 voxels [peak voxel 54, 12, 39] for the first cluster; 20 voxels [peak voxel 33, 45, 15] for the second cluster. Red areas are significant voxels.
