1 Department of Neuroscience "Rita Levi Montalcini," Neurosurgery Unit, University of Turin, Turin, Italy; Division of Neurosurgery, IRCCS Istituto Giannina Gaslini, Genova, Italy. Electronic address: dr.giuseppediperna@gmail.com.
2 Division of Neurosurgery, IRCCS Istituto Giannina Gaslini, Genova, Italy.