1. Interdepartmental Division of Critical Care, University of Toronto, Toronto, Ontario, Canada
2. Sunnybrook Research Institute, Department of Critical Care Medicine, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada
3. Division of Cardiology, Department of Medicine, McGill University, Montreal, Quebec, Canada
4. Peter Munk Cardiac Centre, University Health Network, Toronto, Ontario, Canada
5. Library and Information Services, University Health Network, Toronto, Ontario, Canada
6. Sinai Health System, Toronto, Ontario, Canada
7. Heart and Stroke/Richard Lewar Centre of Excellence, University of Toronto, Toronto, Ontario, Canada