CTAGE5, together with other top hits identified in the gene-wide analyses, namely FBXO33, MIA2 and PNN, lies within a genomic segment on chromosome 14 that was found to be deleted in three subjects with different neurologic and/or psychiatric traits, such as mild mental retardation, severe learning difficulties, motor alterations or ADHD symptoms61. Here, MIA2 is linked to attention deficit-hyperactivity disorder.