1. Neurosurgery Unit, Highly Specialized Hospital and of National Importance “Garibaldi”, Catania, Italy
2. Department of Neurosurgery, Cannizzaro Hospital, Trauma Center, Gamma Knife Center, Catania, Italy
3. Radiodiagnostic Unit, Highly Specialized Hospital of National Importance “Garibaldi”, Catania, Italy
4. Department of Pathological Anatomy, Cannizzaro Hospital, Catania, Italy