- Correspondence to Dr Sophie Elizabeth Park, Research Department of Primary Care and Population Health, UCL, London NW3 2PY, UK;
- Accepted April 11, 2018
- First published June 7, 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.