1. Monash University; Australian and New Zealand Intensive Care Research Centre (ANZIC-RC), Department of Epidemiology and Preventive Medicine; Melbourne Australia 3181
2. The Alfred Hospital; Department of Physiotherapy; Melbourne Australia
3. Toronto Western Hospital; Department of Medicine, Division of Respirology, University Health Network; 2MCL-411Q Toronto ON Canada M5T 2S8
4. Monash University; Department of Physiotherapy; PO Box 527 Melbourne Australia 3199
5. School of Allied Health, Department of Rehabilitation, Nutrition and Sport, La Trobe University; Discipline of Physiotherapy; Melbourne Victoria Australia 3086
6. The Alfred Hospital; The Ian Potter Library; 55 Commercial Road Melbourne Victoria Australia 3000
7. The Alfred Hospital; Department of Intensive Care; Commercial Road Melbourne Australia 3181