Early vagus nerve stimulator implantation as a main predictor of positive outcome in pediatric patients with epileptic encephalopathy - Russo A.; Hyslop A.; Gentile V.; Boni A.; Miller I.; Chiarello D.; Pellino G.; Zenesini C.; Martinoni M.; Lima M.; Ragheb J.; Cordelli D. M.; et al. (Epileptic Disorders, 2021)