KIAA0319 and dyslexia: The dyslexia susceptibility gene KIAA0319, encoding a protein involved in axon growth inhibition (Paracchini et al. 2006; Franquinho et al. 2017), is one of the PSGs under the strongest positive selection in humans relative to the common primate ancestor (raw dN/dS = 3.9; nine nonsynonymous vs. one synonymous mutations in Homo sapiens compared to the common primate ancestor).