1. Human Genetics and Genome Research Division, Clinical Genetics Department; National Research Center; Cairo Egypt
2. Laboratory for Pediatric Brain Disease, Howard Hughes Medical Institute; Rockefeller University; New York NY
3. Division of Pediatric Genetics; Children's Hospital at Montefiore; Bronx NY
4. Pediatric Neurology, Institute of Child Health; Children Hospital; Lahore Pakistan
5. Cairo University Children's Hospital, Division of Neurology and Metabolic Disease; Cairo Egypt
6. Department of Medical Molecular Genetics, Human Genetics and Genome Research Division; National Research Center; Cairo Egypt