HNF1A and attention deficit-hyperactivity disorder: Several binding sites in the Rel/NFKappa transcription factor family are created by the risk allele for rs17335568 and a upstream transcription factor 1 binding site for the risk allele of rs5934770, a transcription factor involved in lipid and glucose homeostasis, although it is not immediately apparent how these particular binding sites might be involved in ADHD pathophysiology.