1. Neurosurgery Department, Gabes University Hospital, Gabes, Tunisia
2. Department of Medicine of Sfax, Institutul National de Metrologie, București, Romania
3. Department of Medicine of Tunis, Tunisia
4. Neurosurgery Department, Mongi Ben Hamida National Institute of Neurology, Tunis,Tunisia
5. Department of Pathology, Rabta Hospital, Tunis, Tunisia