1. Department of Neurosurgery, National Hospital of Niamey, Niamey, Niger
2. Department of Surgery and Surgical Specialties, Faculty of Health Sciences, Abdou Moumouni University of Niamey, Niamey, Niger
3. Department of Radiology, General Hospital of Reference, Niamey, Niger
4. Department of Psychiatry, National Hospital of Niamey, Niamey, Niger,
5. Centre Medical Chirurgical Obstetrical Cote d’Opale, Saint Martin Boulogne, France.