- Correspondence to Prof Dr Jan Y Verbakel, Nuffield Department of Primary Care Health Sciences, Woodstock Road, Oxford OX2 6GG, UK;
- Received November 17, 2016
- Revised November 28, 2017
- Accepted November 28, 2017
- First published December 21, 2017.
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.