1. Adult Intensive Care Unit, Oxford University Hospitals, NHS Foundation Trust, Oxford, UK
2. Department of Critical Care Medicine, Dosseter Ethics Centre, University of Alberta, Edmonton, AB, Canada
3. Department of Anesthesiology and Pain Medicine, Dosseter Ethics Centre University of Alberta, Edmonton, AB, Canada
4. Adult Critical Care Unit, University Hospital of Wales, Cardiff, UK
5. Critical Care Unit, Musgrove Park Hospital, Taunton, UK
6. Department of Anaesthesia, Guy’s and St Thomas’ NHS Foundation Trust, London, UK
7. Nuffield Department of Clinical Neurosciences, OxSTaR Centre, University of Oxford, Oxford, UK
8. Department of Critical Care, Northwick Park Hospital, London, UK