- Correspondence to Nicole K Valtorta, Department of Health Sciences, University of York, Heslington, York YO10 5DD, UK;
- Received 5 October 2015
- Revised 7 December 2015
- Accepted 26 December 2015
- Published in print 1 July 2016.
- Published online 10 June 2016.
- Published first 18 April 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.