- Correspondence to Professor Nigel Unwin, Institute of Health and Society, Newcastle University, Newcastle upon Tyne NE2 4HH, UK;
- Received September 28, 2009
- Accepted January 11, 2010
- First published April 26, 2010.
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.