- Correspondence to Professor Martin Schwellnus, Institute for Sport, Exercise Medicine and Lifestyle Research, University of Pretoria, Faculty of Health Sciences, South Street, Sports Campus, Hatfield, Pretoria 0028, South Africa;
- Accepted March 10, 2017
- First published April 12, 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.