1Surgery, University of Toronto, Toronto, Ontario
2Health Policy, Management and Evaluation, University of Toronto, Toronto, Ontario
3Division of Clinical Decision Making and Health Care, Toronto General Hospital Research Institute, Toronto, Ontario
4Division of General Internal Medicine, Toronto General Hospital, Toronto, Ontario
5Department of Speech Language Pathology
6Department of Medicine, University of Toronto, Toronto, Ontario
Reprint requests and correspondence: David R. Urbach, M.D., Division of Clinical Decision Making and Health Care, Toronto General Hospital, 200 Elizabeth Street, Room 9EN-236A, Toronto, ON M5G 2C4, Canada.
Received January 28, 2005; accepted March 22, 2005.