1. Division of Neurosurgery, Department of Surgical Specialties, Radiological Sciences, and Public Health, University of Brescia, Piazzale Spedali Civili 1, 25121 Brescia, Italy
2. Division of Neurosurgery, Department of Clinical Neuroscience, Geneva University Hospitals (HUG), 1205 Geneva, Switzerland
3. Department of Neurosurgery, Fondazione Policlinico Universitario A. Gemelli IRCSS, 00168 Rome, Italy
4. Department of Neurosurgery, Università Cattolica del Sacro Cuore, 20123 Rome, Italy