ADHD probands harboring rs2229193 ‘CC’ (P = 0.0006), ‘CT’ (P = 0.03), and rs2284411 ‘CC’ (P = 0.0002) genotypes revealed significantly lower GRIN2A and GRIN2B expression respectively (Fig. 5G,H). Here, GRIN2A is linked to attention deficit-hyperactivity disorder.