1 Department of Physiotherapy, Melbourne School of Health Sciences, The University of Melbourne, Melbourne, VIC 3010, Australia; Department of Allied Health, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia. Electronic address: l.denehy@unimelb.edu.au.
2 William Harvey Research Institute, Queen Mary University of London, London, UK; Acute Critical Care Research Unit, Royal London Hospital, Barts Health NHS Trust, London, UK.