SCN1A and Dravet syndrome: The SCN1A associated epilepsies compose a wide spectrum of phenotype ranging from milder febrile seizures to severe epileptic conditions, typically Dravet syndrome (DS; Claes et al., 2003; Nabbout et al., 2003; Ceulemans et al., 2004; Mulley et al., 2005; Harkin et al., 2007; Gambardella and Marini, 2009; Dravet and Oguni, 2013; Kasperaviciute et al., 2013; Gataullina and Dulac, 2017).