Anis Choucha1, Nathan Beucler2,3, Henry Dufour1,4. 1. Department of Neurosurgery, Aix Marseille University, APHM, UH Timone, Marseille, France. 2. Department of Neurosurgery, Sainte-Anne Military Teaching Hospital, Toulon Cedex, France. 3. Ecole du Val-de-Grâce, French Military Health Service Academy, Alphonse Laveran, Paris Cedex, France. 4. Aix Marseille University, CNRS, Institute Neuroscience Timone, CRN2M, Marseille, France.