1 Department of Neurosurgery, Mongi Ben Hamida National Institute of Neurology, Tunis, Tunisia; Faculty of Medicine of Tunis, University of Tunis-El Manar, Tunis, Tunisia. Electronic address: khalil.ghedira@fmt.utm.tn.
2 Department of Neurosurgery, Mongi Ben Hamida National Institute of Neurology, Tunis, Tunisia; Faculty of Medicine of Tunis, University of Tunis-El Manar, Tunis, Tunisia.
3 Department of Anesthesiology and Reanimation, Mongi Ben Hamida National Institute of Neurology, Tunis, Tunisia; Faculty of Medicine of Tunis, University of Tunis-El Manar, Tunis, Tunisia.