1. Department of Medicine, Queen’s University, Kingston, ON, Canada
2. Department of Community Health and Epidemiology, Queen’s University, Kingston, ON, Canada
3. Clinical Evaluation Research Unit, Kingston General Hospital, Kingston, ON, Canada
4. RLG International, Salt Lake City, Utah
5. Australian and New Zealand Intensive Care Research Centre, Department of Epidemiology and Preventive Medicine, Monash University, Melbourne, Australia
6. Department of Intensive Care, Alfred Hospital, Melbourne, Australia