1. Pediatric Neurology Department; Cairo University; Cairo Egypt
2. Clinical and Chemical Pathology Department; Cairo University; Cairo Egypt
3. Clinical Genetics Department; National Research Centre; Cairo Egypt
4. Pediatrics Department; Aswan University; Aswan Egypt
5. Albrecht-Kossel-Institute for Neurodegeneration; Rostock University Medical Centre; Rostock Germany
6. Centogene AG; Rostock Germany
7. Neuroscience Department, Howard Hughes Medical Institute; University of California; San Diego California