- Correspondence to: MsJ Maas NIVEL, Netherlands Institute for Health Services Research, PO Box 1568, 3500 BN Utrecht, Netherlands;
- Accepted January 16, 2006
- First published June 21, 2006.
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.