1. Pediatric Neurology Unit and Laboratories; A. Meyer Children's Hospital - University of Florence; Florence Italy
2. Child Neuropsychiatry; University-Hospital of Verona; Verona Italy
3. Neurology Unit; Bambino Gesù Children's Hospital; Rome Italy
4. Metabolic Unit; A. Meyer Children's Hospital - University of Florence; Florence Italy
5. Metabolic Unit; Bambino Gesù Children's Hospital; Rome Italy
6. Centrum Menselijke Erfelijkheid; UZ Leuven; Leuven Belgium
7. Biochemistry and Genetic Laboratory; AP-HP; Bichat Hospital; Paris France
8. Department of Neurology; Translational Metabolic Laboratory; Radboud University Medical Center; Nijmegen the Netherlands
9. IRCCS Stella Maris; Pisa Italy