- Correspondence to Dr Ruth Diver, Department of Public Health and Primary Care, Institute of Public Health, University of Cambridge, Cambridge CB2 0SR, UK;
- Received December 18, 2017
- Revision received March 18, 2018
- Accepted March 21, 2018
- First published April 4, 2018.
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.