EEF1A2 and undetermined early-onset epileptic encephalopathy: These clinical features are similar to BFNE caused by KCNQ2 variations and are different from those of autosomal-dominant nocturnal frontal lobe epilepsy (ADNFLE) caused by CHRNA4 variations (Steinlein et al., 1995) and developmental and epileptic encephalopathy 33 (DEE33) caused by EEF1A2 variations (Carvill et al., 2020).