Affiliation: | 1. Northern Vascular Centre, Freeman Hospital, Newcastle upon Tyne, UK;2. Division of Surgery and Interventional Sciences, University College London, London, UK;3. Department of Anaesthesia and Intensive Care, Papworth Hospital Theatres Critical Care and Anaesthesia Services, Papworth Hospital, Cambridge, UK;4. Department of Anaesthesia, St Vincent's Health Australia, Melbourne, Victoria, Australia;5. Department of Medical Statistics, London School of Hygiene and Tropical Medicine, London, UK;6. Department of Anaesthetics, University Hospital of Wales Healthcare NHS Trust, Cardiff, UK;7. Department of Anaesthesia, Manchester University NHS Foundation Trust, Manchester, UK;8. Department of Vascular Surgery, University of Western Australia, Perth, Western Australia, Australia |