1 Anaesthesia and Intensive Care, San Martino Policlinico Hospital, IRCCS for Oncology and Neuroscience, Genoa, Italy. kiarobba@gmail.com.
2 Department of Surgical Sciences and Integrated Diagnostics (DISC), University of Genoa, Genoa, Italy.
3 Brain Physics Laboratory, Division of Neurosurgery, Department of Clinical Neurosciences, Cambridge Biomedical Campus, Addenbrooke's Hospital, University of Cambridge, Cambridge, UK.
4 Anaesthesia and Intensive Care Unit, E.O. Ospedali Galliera, Genoa, Italy.
5 School of Medicine and Surgery, University of Milan-Bicocca, Milan, Italy.