1. Division of Pediatric Neurology; University of Florida College of Medicine; PO Box 100296 Gainesville Florida USA 32610
2. Department of Neurology and Psychiatry; Assiut University Hospital; Assiut Egypt
3. Analytic and Translational Genetics Unit; Massachusetts General Hospital and Harvard Medical School; Boston Massachusetts USA
4. Broad Institute of the Massachusetts Institute of Technology and Harvard University; Cambridge Massachusetts USA
5. Division of Genetics & Genomics; Boston Children's Hospital and Harvard Medical School; Boston Massachusetts USA
6. Department of Neurology and Department of Molecular Genetics and Microbiology; University of Florida College of Medicine; Gainesville Florida USA