- Correspondence to Professor Lars Engebretsen, Oslo Sports Trauma Research Center, Norwegian School of Sport Sciences, Pb 4014 Ullevål Stadion, 0806 Oslo, Norway,
- Received June 24, 2014
- Accepted June 24, 2014
- First published August 10, 2014.
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.