1. Department of Pediatric Neurology King Fahad Specialist Hospital Dammam Saudi Arabia
2. Division of Neurology The Hospital for Sick Children Toronto Ontario Canada
3. Department of Pediatric Neurology and Metabolic Cairo University Children Hospital Cairo Egypt
4. Genetic and Metabolic Department King Fahad Specialist Hospital Dammam Saudi Arabia
5. Neuroscience Centre King Fahad Specialist Hospital Dammam Saudi Arabia
6. Program in Genetics and Genome Biology, Division of Clinical and Metabolic Genetics SickKids Research Institute and Hospital for Sick Children Toronto Ontario Canada