- Correspondence to Dr Elsa Kristiansen, Norwegian School of Sport Sciences, P.O. Box 4014, Ullevaal, Oslo, Norway;
- Received May 10, 2016
- Revised July 26, 2016
- Accepted August 13, 2016
- First published September 6, 2016.
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.