1. Department of Neurosciences and Reproductive and Odontostomatological Sciences, Division of Neurosurgery, University of Napoli "Federico II," Naples, Italy;
2. Division of Neurosurgery, Università degli Studi dell’Insubria, Ospedale di Circolo e Fondazione Macchi, Varese, Italy;
3. Division of Neurosurgery, IRCCS "Casa Sollievo della Sofferenza," San Giovanni Rotondo, Italy;
4. ENT Operative Unit, IRCCS "Casa Sollievo della Sofferenza," San Giovanni Rotondo, Italy;
5. Section of Pediatric Neurosurgery, Institute of Neurosurgery, Catholic University Medical School, Rome, Italy;
6. Department of Biomedical and Neuromotor Sciences, University of Bologna, IRCCS Institute of Neurological Sciences of Bologna, "Bellaria" Hospital, Bologna, Italy;
7. Division of Neurosurgery, Neurosurgery, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy; and
8. Department of Pediatric Neurosurgery, Santobono-Pausilipon Children’s Hospital, Naples, Italy