CHD2 and epilepsy with myoclonic atonic seizures: Doose syndrome is associated with mutations in a variety of epilepsy genes, including SCN1A, SCN1B, CACNA1H, SLC2A1, GABRG2, CHD2, SLC6A1, STX1B, GABRB3, SYNGAP1, and WDR45 (33).