1. Department of Genetics, King Faisal Specialist Hospital & Research Center, Riyadh, Saudi Arabia.
2. Department of Neuroscience, and King Faisal Specialist Hospital & Research Center, Riyadh, Saudi Arabia.
3. Department of Medical Genetics, King Faisal Specialist Hospital & Research Center, Riyadh, Saudi Arabia.
4. King Abdullah International Medical Research Centre, King Saud bin Abdulaziz University for Health Sciences, Genetics Division, Department of Pediatrics, King Abdullah Specialized Children Hospital, Riyadh, Saudi Arabia.
5. Center for Pediatric Neurosciences, Cleveland Clinic, Cleveland, Ohio.
6. Division of Pediatric Neurology, College of Medicine, King Saud University, Riyadh, Saudi Arabia.
7. Department of Pathology and King Khalid Hospital, King Saud University, Riyadh, Saudi Arabia.
8. Department of Biochemistry, King Khalid Hospital, King Saud University, Riyadh, Saudi Arabia.
9. Department of Biostatistics, Epidemiology, and Scientific Computing, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia.