Furthermore, in a recent study, the variant rs362990 on the SNAP25 gene was associated with ADHD in which the risk A-allele was also associated with additive decrease in the expression of the SNAP25 transcript in the inferior frontal gyrus of 89 unaffected adult post-mortem tissue (Hawi et al. 2013). The gene discussed is SNAP25; the disease is attention deficit-hyperactivity disorder.