- Correspondence to: R Ljung Department of Public Health Sciences, Division of Social Medicine, Karolinska Institutet, Norrbacka SE-171 76, Stockholm, Sweden;
- Accepted May 1, 2006
- First published November 15, 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.