Study of paediatric patients with the clinical and biochemical phenotype of glucose transporter type 1 deficiency syndrome M. Jiménez Legido; C. Cortés Ledesma; B. Bernardino Cuesta; L. López Marín; V. Cantarín Extremera; C. Pérez-Cerdá; B. Pérez González; E. López Martín; L. González Gutiérrez-Solana;