- Correspondence to: Dr H S J Picavet, Centre for Prevention and Health Services Research (PZO, pb 101), National Institute of Public Health and the Environment, PO box 1, 3720 BA Bilthoven, Netherlands; E:
- Accepted December 2, 2002
- First published July 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.