1. Neurosurgery Unit, Head-Neck and NeuroScience Department, University Hospital of Udine, 33100 Udine, Italy
2. Department of Oncology 1, Veneto Institute of Oncology IOV-IRCCS, 35128 Padua, Italy
3. Division of Neurosurgery, Department of Neurosciences, Reproductive and Odontostomatological Sciences, Università degli Studi di Napoli Federico II, 80131 Naples, Italy
4. Department of Neuroradiology, NESMOS S.Andrea Hospital, University Sapienza, 00189 Rome, Italy
5. Department of Neurosurgery, Azienda Ospedaliero Universitaria Pisana, 56123 Pisa, Italy
6. Department of Oncology, University of Oxford, Oxford OX3 7DQ, UK
7. Department of Neurosciences, Biomedicine, and Movement Sciences, Institute of Neurosurgery, University of Verona, 37129 Verona, Italy