- Correspondence to:
Dr P Tugwell, Center for Global Health, University of Ottawa, Institute of Population Health, 1 Stewart Street, Room 312, Ottawa, Ontario, Canada, K1N 6N5;
- Accepted September 2, 2002
- First published April 1, 2003.
If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.