2013). ANK3 encodes AnkyrinG, which has three brain‐specific isoforms involved in action potential propagation and post‐synaptic glutamatergic signaling (Sobotzik et al. 2009). Analysis of gene imprinting in ADHD suggests CALD1 contributes to its heritability (Smajlagic et al. 2019), and genomic analysis of pediatric ADHD patients reveals SNPs in the CMTM8 gene (Pagerols et al. 2018), although it is unclear how these genes relate to the characteristics of ADHD. Here, CALD1 is linked to attention deficit-hyperactivity disorder.