- Correspondence to Katy Turner, School of Social and Community Medicine, University of Bristol, UK;
- Published in print 1 February 2011.
- Published online 17 January 2011.
- Published first 8 November 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.