Fabio Torregrossa1, Domenico Gerardo Iacopino1, Giovanni Grasso2. 1. Section of Neurosurgery, Department of Biomedicine, Neurosciences, and Advanced Diagnostics (BiND), University of Palermo, Palermo, Italy. 2. Section of Neurosurgery, Department of Biomedicine, Neurosciences, and Advanced Diagnostics (BiND), University of Palermo, Palermo, Italy. Electronic address: giovanni.grasso@unipa.it.