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Competing interests: LP has received research funds from Johnson & Johnson, Smith+Nephew, Linvatec, Stryker. LP has received consultant fees and royalties from Smith+Nephew, Tuta, Australian Medical Technologies. JR has received research funds and consultancy fees from Stryker. LS position is funded by research funds as disclosed above.
Figures reprinted from American Journal of Sports Medicine. The final, definitive version of this paper has been published in American Journal of Sports Medicine 35(1) 2007 by SAGE Publications Ltd, All rights reserved. ©