aIntensive Care Unit, St. Vincents Hospital

bUniversity of New South Wales

cCritical Care and Trauma Division, The George Institute for Global Health, Sydney, Australia

dIntensive Care Unit, Geelong University Hospital

eDeakin University

fANZICS Research Centre, Melbourne, Victoria, Australia

gDepartment of Physical Medicine, Rehabilitation and Occupational Medicine, Medical University of Vienna, Austria

Correspondence to Priya Nair, MBBS, MD, FCICM, PhD, St. Vincents Hospital, Victoria Street, Darlinghurst, Sydney, NSW 2010. Tel: +61 2 83823611; e-mail: [email protected]