- Correspondence to Dr Grant R Tomkinson, Department of Kinesiology and Public Health Education, University of North Dakota, Grand Forks, ND 58202, USA;
- Accepted 30 October 2017
- Published online 30 November 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.