- Correspondence to Professor Martin Schwellnus, Sport, Exercise Medicine and Lifestyle Institute (SEMLI) and Section Sports Medicine, University of Pretoria, Pretoria 0020, South Africa;
- Accepted October 26, 2018
- First published November 9, 2018.
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.