- T van Geel, Maastricht University, Department of General Practice, PO Box 616, 6200 MD, Maastricht, The Netherlands;
- Accepted July 26, 2008
- First published August 3, 2008.
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.