1. ICU, John Hunter Hospital, Newcastle, New South Wales, Australia
2. School of Medicine and Public Health, University of Newcastle, Newcastle, New South Wales, Australia
3. Scientific Institute for Research, Hospitalization and Health Care Multimedica, Sesto San Giovanni, Milan, Italy
4. Anaesthesia and Intensive Care Medicine, School of Medicine, and
5. Regenerative Medicine Institute, CÚRAM Centre for Research in Medical Devices, National University of Ireland Galway, Galway, Ireland
6. Department of Anaesthesia, University Hospital Galway, Saolta Hospital Group, Galway, Ireland
7. Medical School, Australian National University, Canberra, New South Wales, Australia
8. Faculty of Health, University of Canberra, Canberra, New South Wales, Australia; and
9. ICU, The Canberra Hospital, Canberra, New South Wales, Australia