CDKN2A and migraine disorder: Among these, the CTC1 p.Gly414Ala variant (found in 5 patients) and the CDKN2A p.Ala148Thr variant (identified in 13 patients) were also identified in a separate whole exome trio analysis of migraine families (unpublished data), suggesting a shared genetic basis for migraine susceptibility across different forms of migraine.