1. Intensive Care Unit, Bufalini Hospital, Cesena, Italy
2. Department of Neurosciences, University of Padua, Padua, Italy
3. Division of Neurosurgery, Azienda Ospedaliero-Universitaria, Parma, Italy
4. Clinica Neurochirurgica, University of Messina, Messina, Italy
5. IRCCS Policlinico S. Matteo, Pavia, Italy
6. Division of Neurosurgery, Azienda Ospedaliera Mestre, Mestre, Italy
7. Department of Neurosurgery, Azienda Ospedaliera Verona, Verona, Italy
8. Department of Neurosurgery, University of Rome La Sapienza, Rome, Italy
9. Institute of Neurosurgery, Catholic University of Rome, Rome, Italy
10. Clinica Neurochirurgica, University of Torino, Turin, Italy
11. Clinica Neurochirurgica, Ospedale Policlinico IRCCS, Milan, Italy
12. Clinica Neurochirurgica, University of Brescia, Brescia, Italy
13. Clinica Neurochirurgica, Università dell'Insubria Varese, Varese, Italy