1 Graduate School of Health, University of Technology Sydney, Ultimo, NSW 2007, Australia; Royal Prince Alfred Hospital, Camperdown, NSW 2050, Australia; Critical Care Division, The George Institute for Global Health, Newtown, NSW 2042, Australia; Australian and New Zealand Intensive Care Research Centre (ANZIC-RC), School of Public Health and Preventive Medicine, Monash University, St Kilda Rd, VIC 3004, Australia. Electronic address: Amy.Freeman-Sanderson@uts.edu.au.