1. Neurosurgery, Department of Neurosciences, University of Turin, 10126 Turin, Italy
2. Neurosurgery, Ospedale SS. Annunziata, 74121 Taranto, Italy
3. UOC Neurochirurgia, Dipartimento di Medicina Traslazionale e per la Romagna, Università degli Studi di Ferrara, 44121 Ferrara, Italy
4. Headache Science and Neurorehabilitation Center, IRCCS Mondino Foundation, Department of Brain and Behavioral Sciences, University of Pavia, 27100 Pavia, Italy
5. Humanitas Gradenigo, 10100 Turin, Italy