1. Division of Anaesthesia, Department of Medicine, Addenbrooke’s Hospital, University of Cambridge, Cambridge, United Kingdom
2. Department of Anaesthesia and Critical Care Medicine, Centre Hospitalier Universitaire de Rennes, Rennes, France
3. Wolfson Brain Imaging Centre, Department of Clinical Neurosciences, Addenbrooke’s Hospital, University of Cambridge, Cambridge, United Kingdom
4. Department of Anaesthesiology, University Hospital Basel, Basel, Switzerland
5. Department of Clinical Research, University of Basel, Basel, Switzerland
6. Department of Anaesthesia, Norfolk and Norwich University Hospitals National Health Service Foundation Trust, Norwich, United Kingdom
7. Birmingham Acute Care Research Group, Department of Critical Care Medicine, Queen Elizabeth Hospital, University of Birmingham, Birmingham, United Kingdom
8. Division of Neurosurgery, Department of Clinical Neurosciences, Addenbrooke’s Hospital, University of Cambridge, Cambridge, United Kingdom