1. Division of Pediatric Neurology, Department of Pediatrics, King Saud University, Riyadh, Saudi Arabia.
2. The Folkhälsan Institute of Genetics and the Department of Medical Genetics, Haartman Institute, University of Helsinki, Helsinki, Finland.
3. Department of Radiology and Diagnostic Imaging, College of Medicine, King Saud University, Riyadh, Saudi Arabia.
4. Pediatric Cardiology Division, Cardiac Science Department, College of Medicine, King Saud University, Riyadh, Saudi Arabia.
5. Department of Pathology, College of Medicine, King Saud University, Riyadh, Saudi Arabia.
6. Translational Genomics Department, Center for Genomic Medicine, King Faisal Specialist Hospital and Research Centre, MBC: 03, Riyadh, Saudi Arabia.
7. Biostatistics, Epidemiology, and Scientific Computing Department, MBC: 03, Riyadh, Saudi Arabia.
8. Tampere Neuromuscular Research Unit, The Folkhälsan Institute of Genetics and the Department of Medical Genetics, Haartman Institute, University of Helsinki, Helsinki, Finland.