- Correspondence to: Mrs Torstveit Norwegian University of Sport and PE, PO Box 4014, Ullevaal Stadion, Oslo 0806, Norway;
- Accepted April 6, 2004
- First published February 23, 2005.
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.