1. Department of Molecular and Human Genetics Baylor College of Medicine Houston Texas
2. Texas Children's Hospital Houston Texas
3. Department of Genetics and Molecular Medicine‐IPER, Institut de Recerca Sant Joan de Déu and CIBERER (ISCIII) Hospital Sant Joan de Déu Barcelona Spain
4. Laboratory of Synaptic Metabolism, Institut de Recerca Sant Joan de Déu and CIBERER (ISCIII) Hospital Sant Joan de Déu Barcelona Spain
5. Baylor Genetics Laboratory Houston Texas
6. School of Medicine Universitat de Barcelona Barcelona Spain
7. Division of Pediatrics University of Barcelona School of Medicine and Health Sciences, and Institute of Medicine and Dermatology, Hospital Clínic Barcelona Spain
8. Department of Clinical Biochemistry, Institut de Recerca Sant Joan de Déu and CIBERER (ISCIII) Hospital Sant Joan de Déu Barcelona Spain
9. Neurometabolic Unit, Department of Neurology Institut de Recerca, Sant Joan de Déu metabERN and CIBERER (ISCIII), Hospital Sant Joan de Déu Barcelona Spain
10. Department of Molecular Physiology and Biophysics Baylor College of Medicine Houston Texas