1. Department of Intensive Care Medicine, Frankston Hospital, Frankston, Victoria, Australia
2. Faculty of Medicine, Nursing and Health Sciences, Monash University, Victoria, Australia
3. Australian and New Zealand Intensive Care Research Center, Department of Epidemiology and Preventive Medicine, School of Public Health and Preventive Medicine, Monash University, The Alfred Centre, Melbourne Victoria, Australia
4. The Australian and New Zealand Intensive Care Society Centre for Outcome and Resource Evaluation, Sydney, Australia
5. Department of Intensive Care, The Alfred Hospital, Prahran, Victoria, Australia
6. Department of Intensive Care Medicine, St Vincent’s Hospital, Sydney, Australia
7. University of New South Wales, Australia, Sydney, Australia
8. Institute of Neurology, University College London Hospitals NHS Foundation Trust, London, United Kingdom