1. Department of Medicine and Sunnybrook Research Institute, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada
2. Institute for Clinical Evaluative Sciences, Toronto, Ontario, Canada
3. Department of Medicine
4. Institute of Health Policy, Management, and Evaluation, and
5. The Hospital for Sick Children, Research Institute, Toronto, Ontario, Canada
6. Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada
7. The Ottawa Hospital Research Institute, Ottawa, Ontario, Canada
8. Department of Medicine, University of Ottawa, Ottawa, Ontario, Canada
9. Institute for Clinical Evaluative Sciences, Ottawa, Ontario, Canada
10. University Health Network, Toronto, Ontario, Canada; and
11. McGill University Health Centre, Montreal, Quebec, Canada