1. Centre de recherche Clinique Étienne-Le Bel, Université de Sherbrooke, Sherbrooke, Quebec, Canada
2. Department of Medicine (Division of Critical Care), The Ottawa Hospital, Ottawa, Ontario, Canada
3. Center for Health Evaluation and Outcome Sciences and Department of Medicine, St Paul’s Hospital and University of British Columbia, Vancouver, British Columbia, Canada
4. Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, Ontario, Canada
5. Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, Ontario, Canada5Department of Medicine, McMaster University, Hamilton, Ontario, Canada
6. Department of Surgery, McMaster University, Hamilton, Ontario, Canada
7. Department of Medicine, Hôpital Maisonneuve Rosemont, Montreal, Quebec, Canada
8. Department of Intensive Care Medicine, Nepean Hospital, University of Sydney, Sydney, Australia
9. Department of Pulmonary and Critical Care, Mayo Clinic, Rochester, Minnesota
10. Department of Critical Care, Queen’s University, Kingston, Ontario, Canada
11. Department of Intensive Care Medicine, Blacktown Hospital, Sydney, Australia
12. Department of Critical Care, Guys and St Thomas Hospital, London, England
13. Department of Ultrasonic Angiology, Guys and St Thomas Hospital, London, England
14. Department of Anesthesia and Critical Care, King Abdulaziz University, Jeddah, Saudi Arabia
15. Department of Radiology, Mayo Clinic, Rochester, Minnesota
16. Department of Radiology, McMaster University, Hamilton, Ontario, Canada
17. Department of Medical Imaging, University of Toronto, Toronto, Ontario, Canada