ADARB2 and migraine disorder: These four SNPs, and others, in the RNA editing genes ADARB1 and ADARB2, were further investigated in an Australian migraine case–control population because they fit criteria for migraine neuropathology, i.e. a) are expressed in the brain or CNS, b) regulate neurological pathways (e.g. neurotransmitters) and c) are plausibly related to migraine neuropathology (e.g. cellular hyperexcitability, ion channel disruption).