1. Department of Neurosurgery, Ospedale Sant'Eugenio, Roma, Lazio, Italy
2. Department of Biomedical Sciences, Humanitas University, Pieve Emanuele-Milan, Italy
3. IRCCS Humanitas Research Hospital, Rozzano-Milan, Italy
4. Department of Neurosurgery, Umberto I Policlinico di Roma, Roma, Lazio, Italy
5. Department of Neurosurgery, University of Bari, Bari, Puglia, Italy