KCNQ2 and Myokymia: KCNQ2: epileptic encephalopathy, early infantile, 7 (MIM 613720); myokymia (MIM 121200); seizures, benign neonatal, 1 (MIM 121200);CHRNA4: epilepsy, nocturnal frontal lobe, 1 (MIM 600513)