1. Department of Neurosurgery, Percy Military Teaching Hospital , Clamart Cedex 92140, France
2. Department of Neurosurgery, Sainte Anne Military Teaching Hospital , Toulon Cedex 83000, France
3. Department of ENT and Maxillo Facial Surgery, Percy Military Teaching Hospital , Clamart Cedex 92140, France
4. Department of Maxillo Facial Surgery, Laveran Military Teaching Hospital , Marseille Cedex 13384, France
5. Department of Ophthalmology, Percy Military Teaching Hospital , Clamart Cedex 92140, France