P1 underwent multiple genetic tests without detected abnormalities, including oligonucleotide array, single gene sequencing for SCN1A, CDKL5, SLC2A1, sequencing, deletion, and duplication testing for MECP2, and the epiSEEK panel (Courtagen, Woburn, MA, USA) that included 71 known epilepsy genes. Here, MECP2 is linked to epilepsy.