- Correspondence to Dr Alejandra Recio-Saucedo, University of Southampton, Building 67, Highfield, Southampton, SO17 1BJ,
- Received April 13, 2015
- Revised June 18, 2015
- Accepted July 8, 2015
- First published August 13, 2015.
This web only file has been produced by the BMJ Publishing Group from an electronic file supplied by the author(s) and has not been edited for content.
- Data supplement 1 - Online supplement
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.