1. Neurosurgery Department, Strasbourg University Hospital, 67000 Strasbourg, France
2. Neurosurgery Unit of “Dipartimento di Scienze Mediche Chirurgiche e Neuroscienze”, Siena University Hospital, 53100 Siena, Italy
3. Swiss Medical Network, Clinique de Genolier, 1272 Genolier, Switzerland
4. Icademie School, 83000 Toulon, France
5. Assistance and Chronicity Unit of Alto Adige NHS Trust, 39100 Bolzano, Italy
6. Neurosurgery Department, Pasteur Hospital, 68000 Colmar, France
7. Neurosurgery Department, Ospedale G. Mazzini Teramo, 64100 Teramo, Italy
8. Neurosurgery Department, Andria Hospital, 76123 Andria, Italy