1. Departments of Pediatrics and Neurology, The University of Texas Medical School at Houston, Houston
2. Department of Pediatrics, Baylor College of Medicine and Texas Children’s Hospital, Houston
3. Department of Genetics and Metabolism, Massachusetts General Hospital, Harvard Medical School, Boston
4. Genetic Metabolic Center for Education, Salem, Massachusetts
5. Department of Molecular and Human Genetics, Baylor College of Medicine and Texas Children’s Hospital, Houston
6. Center for Pediatric Neurology, Neurosciences Institute, Cleveland Clinic, Cleveland, Ohio
7. Department of Pediatrics, Children’s Hospital of Pittsburgh of University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania