- Correspondence to Dale Forsdyke, Applied Human Sciences Department, Faculty of Health and Life Sciences, York St John University, Lord Mayors Walk, York YO31 7EX, UK;
- Received March 24, 2015
- Revised September 4, 2015
- Accepted November 8, 2015
- First published February 17, 2016.
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- Data supplement 1 - Online supplement
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