1. Department of Surgery, Division of Neurosurgery, Department of Radiology
2. Department of Neurosurgery, Centre Hospitalier Universitaire, University of Liège; Liège, Belgium
3. Interventional Neuroradiology Unit, Centre Hospitalier de l'Université de Montréal (CHUM), Hôpital Notre-Dame; Montreal, QC, Canada
4. Department of Neurosurgery, University Magna Graecia; Catanzaro, Italy