1. Division of Neurosurgery, ASST Ovest Milanese, Legnano Hospital, Milan;
2. Neurosurgery Unit, ASST Fatebenefratelli Sacco, Milan;
3. Institute of Neurosurgery, A. Gemelli University Polyclinic, IRCCS and Foundation, Sacred Heart Catholic University, Rome;
4. Department of Neurosurgery, Fondazione IRCCS Policlinico San Matteo, Pavia;
5. Division of Neurosurgery, Università degli Studi di Napoli Federico II, Naples;
6. Department of Biomedical and Neuromotor Sciences (DIBINEM), University of Bologna; and
7. Division of Neurosurgery, BIOMORF Department, University of Messina, Italy