- Correspondence to Dr Patrick White, Division of Health and Social Care Research, Department of Primary Care and Public Health Sciences, King's College London, 9th Floor Capital House, Weston Street, London SE1 3QD, UK;
- Received July 19, 2013
- Revised November 5, 2013
- Accepted November 7, 2013
- First published November 22, 2013.
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.