OXTR and attention deficit-hyperactivity disorder: Recently, Tugba Kalyoncu et al. showed that the TT genotype in OXTR rs4686302 appeared to be more frequent in the children with ADHD, compared with that in the healthy controls, and that the ADHD children with the CT/TT genotype in OXTR rs4686302 displayed noticeably worse performance on a facial emotion recognition task than those with the CC genotype (Kalyoncu et al., 2019).