Article info
PDF
- Correspondence to Dr S I Watson, Warwick Medical School, University of Warwick, A-155, Warwick Medical School, University of Warwick, Coventry, CV4 7AL, UK; s.i.watson{at}warwick.ac.uk
Citation
Publication history
- Received July 22, 2015
- Revised November 6, 2015
- Accepted November 12, 2015
- First published February 9, 2016.
Article Versions
- Previous version (16 August 2019).
- You are viewing the most recent version of this article.
Supplementary Data
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 appendix A
- Data supplement 2 - Online appendix B
- Data supplement 3 - Online appendix C
Press release
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.
Press release
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.
Request permissions
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.