JAG1 and attention deficit-hyperactivity disorder: A de novo 797 kb microduplication of 20p12.2 which included JAG1 was reported in a 7-year-old girl who showed a wide range of symptoms including facial dysmorphism, intellectual disability, congenital heart defect and behavioral concerns, such as ADHD (Attention Deficit Hyperactivity Disorder), SPD (Sensory Processing Dysfunction), motor clumsiness, and poor self-regulation [34].