1. Institute for Health and Sport, Victoria University , Footscray, Victoria 3011 , Australia
2. School of Allied Health, Human Services and Sport, La Trobe University , Melbourne, Victoria 3000 , Australia
3. Department of Respiratory Medicine, The Alfred Hospital , Prahran, Victoria 3004 , Australia
4. Department of Allergy, Immunology and Respiratory Medicine, Central Clinical School, The Alfred Hospital, Monash University , Melbourne, Victoria 3004 , Australia
5. Department of Emergency Medicine, Royal Melbourne Hospital , Parkville, Victoria 3050 , Australia
6. Department of Critical Care, Faculty of Medicine, University of Melbourne , Parkville, Victoria 3010 , Australia
7. Black Dog Institute , Randwick, New South Wales 2031 , Australia
8. Faculty of Medicine, University of New South Wales , Sydney, New South Wales 2052 , Australia
9. Centre for Health Policy, University of Melbourne , Parkville, Victoria 3010 , Australia
10. Australasian Faculty of Occupational and Medicine, Royal Australasian College of Physicians , Sydney, New South Wales 2000 , Australia
11. Department of General Medicine, Royal Melbourne Hospital , Parkville, Victoria 3050 , Australia
12. School of Health and Biomedical Sciences, RMIT University , Bundoora, Victoria 3083 , Australia
13. Institute of Health and Sport, Victoria University , Footscray, Victoria 3011 , Australia