1. Outcomes Assessment Planning Team of the College of Physicians and Surgeons of Ontario, Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, Ontario, Canada,
2. Outcomes Assessment Planning Team of the College of Physicians and Surgeons of Ontario, Department of Epidemiology and Biostatistics, University of Western Ontario, London, Ontario, Canada
3. Outcomes Assessment Planning Team of the College of Physicians and Surgeons of Ontario, Quality Management Division, College of Physicians and Surgeons of Ontario, Toronto, Ontario, Canada
4. Outcomes Assessment Planning Team of the College of Physicians and Surgeons of Ontario, Quality Management Division, College of Physicians and of Ontario, Toronto, Ontario, Canada