- Correspondence to Mario Bizzini, Department of Research, FIFA Medical Assessment and Research Centre, Schulthess Clinic, Lengghalde 2, Zürich 8008, Switzerland;
- Received January 23, 2013
- Accepted January 23, 2013
- First published February 10, 2013.
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.