KCNB1 and epilepsy: Seven genes were noticed in ESESS/CSWSS/epilepsy-aphasia spectrum solely including SCN2A, KCNQ2, KCNA2, GRIN2A, CNKSR2, SLC6A1 and KCNB1. Out of 89 CNVs, 9 were recurrent whilst 45 were non-recurrent.