- Correspondence to: Dr Willem van Mechelen VU University Medical Centre, VU University Medical Centre, Department of Social Medicine and EMGO Institute, Van der Boechorstrstraat 7, NL-1081 BT Amsterdam, Netherlands;
- Accepted July 16, 2003
- First published July 23, 2004.
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.