1. Neurosurgery Department, Saint Georges Hospital and University Medical Center, Balamand University, Beirut, Lebanon
2. Pediatric Neurology Unit, Saint Georges Hospital and University Medical Center, Balamand University, Beirut, Lebanon
3. Radiology Department, Saint Georges Hospital and University Medical Center, Balamand University, Beirut, Lebanon
4. Neuropathology Unit, Brugmann University Hospital, and Children Academic Hospital, Université Libre de Bruxelles (U.L.B.), Brussels, Belgium