1. ICES, Toronto, Ontario, Canada;
2. Institute of Health Policy, Management, and Evaluation, and
3. Ottawa Hospital Research Institute, Ottawa, Ontario, Canada;
4. Bruyère Research Institute, Ottawa, Ontario, Canada;
5. Department of Medicine, University of Ottawa, Ottawa, Ontario, Canada;
6. ICES, Ottawa, Ontario, Canada;
7. Institute for Healthcare Delivery and Population Science, University of Massachusetts Medical School–Baystate, Springfield, Massachusetts; and
8. Department of Medicine, University of Toronto, Toronto, Ontario, Canada;
9. Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada