1. Division of Anaesthesia University of Cambridge Cambridge UK
2. Department of Clinical Neurosciences University of Cambridge Cambridge UK
3. Department of Neurology, Klinikum rechts der Isar Technische Universität München München Germany
4. Department of Anaesthesiology and Intensive Care Medicine, Klinikum rechts der Isar Technische Universität München München Germany
5. Department of Neurology Asklepios Clinic Bad Tölz Germany
6. Wolfon Brain Imaging Centre University of Cambridge Cambridge UK