1. Department of Biomedicine, Neurosciences and Advanced Diagnostic, Section of Neurosurgery, University of Palermo, Palermo, Italy.
2. Department of Health Promotion Sciences, Section of Infectious Diseases, University of Palermo, Palermo, Italy.
3. Department of Health Promotion Sciences, Pathology Unit, University of Palermo, Palermo, Italy.
4. Department of Diagnostic and Therapeutic Services, and Neurology Service, Mediterranean Institute for Transplantation and Advanced Specialized Therapies, Radiology Service, University of Palermo & ISMETT, Palermo, Italy.