1 Neurosurgery Unit, Fondazione IRCCS Policlinico S. Matteo, Pavia, Italy; Department of Clinical-Surgical, Diagnostic and Pediatric Sciences, Università degli Studi di Pavia, Pavia, Italy. Electronic address: danielebongetta@hotmail.com.
2 Neurosurgery Unit, Fondazione IRCCS Policlinico S. Matteo, Pavia, Italy.
3 Neuroradiology Unit, Fondazione IRCCS Policlinico S. Matteo, Pavia, Italy.