CHMP7 and attention deficit-hyperactivity disorder: Mixed linear modelling demonstrated a significant reduction in mRNA levels (F = 71.41 (2, 4), p = 0.001, Fig. 2), and chmp7+/− fish had 53% total chmp7 mRNA compared to chmp7+/+ (t = −5.13 (4), p = 0.007), supporting the use of chmp7+/− fish as a model of the reduction in CHMP7 mRNA levels correlated with the rs2294123 homozygous ADHD risk allele (T).