PRXL2C and attention deficit-hyperactivity disorder: The AAED1 gene (coding for the AhpC/TSA Antioxidant Enzyme Domain Containing 1 protein) was significantly associated with persistent ADHD in the exome-chip sample, and the rare variant in this gene (rs151326868; MAF for C-allele in ExAC = 4.38 × 10−4) segregated with ADHD risk in family P2.