1 Department of Physiotherapy, Melbourne School of Health Sciences, The University of Melbourne, Level 7 Alan Gilbert Building, Parkville, 3010, Australia.
2 Department of Physical Medicine and Rehabilitation, University of Pittsburgh School of Medicine, University of Pittsburgh Medical Center, Kaufmann Medical Building, Suite 201, 3471 Fifth Avenue, Pittsburgh, PA, 15213, USA.
3 Outcomes After Critical Illness and Surgery (OACIS) Group, Division of Pulmonary and Critical Care Medicine, Department of Physical Medicine and Rehabilitation, Medical Director, Critical Care Physical Medicine and Rehabilitation Program, Johns Hopkins University, 1830, East Monument Street, 5th Floor, Baltimore, MD, 21205, USA. dale.needham@jhmi.edu.