@article{ref1,
title="Youth sports anterior cruciate ligament and knee injury epidemiology: who is getting injured? In what sports? When?",
journal="Clinics in sports medicine",
year="2011",
author="Shea, Kevin G. and Grimm, Nathan L. and Ewing, Christopher K. and Aoki, Stephen K.",
volume="30",
number="4",
pages="691-706",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0278-5919",
doi="10.1016/j.csm.2011.07.004",
url="http://dx.doi.org/10.1016/j.csm.2011.07.004"
}