1. Department of Neurosurgery, Grande Ospedale Metropolitano Niguarda, Milan;
2. Department of Pathophysiology and Transplantation University of Milan;
3. Department of Neurosurgery, Fondazione IRCCS Istituto Neurologico Besta, Milan, Italy;
4. Department of Neurological Surgery, Johns Hopkins Medical School, Baltimore, Maryland;
5. Department of Neurosurgery, Spedali Civili and University of Brescia;
6. Department of Neurosurgery, Ospedale di Circolo ASST Sette Laghi, University of Insubria, Varese; and
7. Department of Neurosurgery, Humanitas Research Hospital and University, Milan, Italy