- Correspondence to Professor Laurence Gruer, Usher Institute for Population Health Sciences and Informatics, University of Edinburgh, Teviot Place, Edinburgh EH8 9AG, UK;
- Received 24 February 2016
- Revised 30 May 2016
- Accepted 4 July 2016
- Published online 29 July 2016.
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.