1. Resident in Neurosurgery, Department of Neurosurgery, Fann Teaching Hospital, Cheikh Anta Diop Avenue, Postal Address 5035, Dakar, Senegal
2. 2Associate Professor of Neurosurgery, Department of Neurosurgery, Idrissa Pouye General Hospital, Grand Yoff, Postal Address 3270, Dakar, Senegal
3. Neurosurgeon, Department of Neurosurgery , Idrissa Pouye General Hospital, Grand Yoff, Postal Address 3270, Dakar, Senegal
4. Neurologist, Department of Internal Medicine, Idrissa Pouye General Hospital, Grand Yoff, Postal Address 3270, Dakar, Senegal