1. Department of Neurosurgery, Neurosurgical Clinic, AOUP “Paolo Giaccone”, Post Graduate Residency Program in Neurosurgery, Italy.
2. Department of Experimental Biomedicine and Clinical Neurosciences, School of Medicine, Palermo, Italy.
3. Department of Neuroscience, Division of Neurosurgery, Reproductive and Odontostomatological Sciences, Napoli, Italy.
4. Department of Neurosurgery, Villa Sofia Hospital, Palermo, Italy.
5. Department of Neurosurgery, ARNAS Garibaldi, Catania, Italy.