- Correspondence to Dr Katriina Whitaker, School of Health Sciences, University of Surrey, Guildford GU2 7XH, UK;
- Received November 12, 2015
- Revised January 26, 2016
- Accepted February 4, 2016
- First published February 24, 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.