Welcome to the homepage of the CESS at Great Ormond Street Hospital (GOSH). About usFurther information about the CESS. What is epilepsy surgery?Discover more about epilepsy surgery. ReferralsReferring to the CESS. Meet the teamComprehensive staff list for the CESS. Research and publicationsFind out about research in the CESS. Clinical outcomesLearn how we measure our treatment effectiveness. Contact usDetails on how to contact the CESS.