HTR1A and attention deficit-hyperactivity disorder: The difference between AS mothers and ADHD or control mothers was statistically significant for HTR1A gene (AS vs. ADHD: LSD = 1.92, p = 0, AS vs. control: LSD = 2.26, p = 0) and for the RELN gene (AS vs. ADHD: LSD = 3.09, p = 0.001, AS vs. control: LSD = 3.38, p = 0).