IMMP2L and attention deficit-hyperactivity disorder: The 7q31 deletion was considered a risk factor in several neuropsychiatric disorders, including ASD (Maestrini et al. 2010; Pagnamenta et al. 2010; Casey et al. 2012), ADHD (Elia et al. 2010) and language disorder (Lai et al. 2001) and partial deletions of the IMMP2L gene in particular has been described as risk factors for neurological diseases with an incomplete penetrance (Gimelli et al. 2014).