1 Neurosurgical Clinic, AOUP "Paolo Giaccone", Post Graduate Residency Program in Neurologic Surgery, Department of Experimental Biomedicine and Clinical Neurosciences, School of Medicine, University of Palermo, Palermo, Italy. Electronic address: brunassolara@gmail.com.
2 Department of Neurosurgery, Fondazione Policlinico Agostino Gemelli IRCCS, Rome, Italy.
3 Department of Neurosurgery, Fondazione Policlinico Agostino Gemelli IRCCS, Rome, Italy; Institute of Neurosurgery, Catholic University of the Sacred Heart, Rome, Italy.