1 Department of Neurosurgery, ARNAS Garibaldi, P. O. Garibaldi Nesima, Catania, Italy.
2 Department of Experimental Biomedicine and Clinical Neurosciences, School of Medicine, Postgraduate Residency Program in Neurological Surgery, Neurosurgical Clinic, AOUP "Paolo Giaccone," Palermo, Italy.
3 Neuroscience, Reproductive and Odontostomatological Sciences, Division of Neurosurgery, Università degli Studi di Napoli "Federico II," Naples, Italy.
4 Department of Experimental Biomedicine and Clinical Neurosciences, School of Medicine, Postgraduate Residency Program in Neurological Surgery, Neurosurgical Clinic, AOUP "Paolo Giaccone," Palermo, Italy. Electronic address: francesca.graziano03@unipa.it.