- Correspondence to Dr Salma Ahmed Ayis, Department of Primary Care and Public Health Sciences, King's College London, 42 Weston St, London SE1 3QD, UK;
- Received July 11, 2012
- Revised September 28, 2012
- Accepted October 1, 2012
- First published November 1, 2012.
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.