1. Inserm U1127, CNRS UMR7225, Sorbonne Universités, UPMC Université Paris 06, UMR_S1127, Institut du Cerveau et de la Moelle épinière; Paris France
2. Ecole Pratique des Hautes Etudes, Pitié-Salpêtrière Hospital, ICM; Paris France
3. Faculty of Medicine; University of Khartoum; Khartoum Sudan
4. Division of Pediatric Neurology; Department of Pediatrics; College of Medicine, King Saud University; Riyadh Saudi Arabia
5. Department of Molecular Biology; Institute of Endemic Diseases, University of Khartoum; Khartoum Sudan
6. Department of Biochemistry; Faculty of Medicine, National University; Khartoum Sudan
7. Faculty of Science; University of Elneelen; Khartoum Sudan
8. APHP; Department of Genetics; Pitié-Salpêtrière Hospital; Paris France