1. Department of Neurosurgery, Cannizzaro Hospital, Catania, Italy
2. Department of Neurosurgery, Policlinico Universitario Agostino Gemelli, Roma, Lazio, Italy
3. Catholic University of the Sacred Heart Rome Campus, Roma, Italy
4. Department of Neurosurgery, Head and Neck Surgery, Poliambulanza Foundation Hospitals, Brescia, Lombardia, Italy
5. Department of Neurosurgery, Azienda Ospedaliera Cannizzaro, Catania, Sicilia, Italy
6. Department of Pathological Anatomy, Cannizzaro Hospital, Catania, Sicilia, Italy
7. Department of Neurosurgery, Paracelsus Medical Private University, Salzburg, Austria
8. Department of Neurosurgery, National Specialist Hospital Garibaldi, Catania, Sicilia, Italy