- Correspondence to Suzanne Ablard, School of Health and Related Research, The University of Sheffield, Sheffield S1 4DA, UK;
- Received December 15, 2016
- Revised March 29, 2017
- Accepted April 1, 2017
- First published May 9, 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.