@article{ref1,
title="Head injury - football",
journal="Medicine and science in sports and exercise",
year="2007",
author="Patel, Dilipkumar R. and Jacobson, Michelle C.",
volume="39",
number="5",
pages="s110-S110",
abstract="<p>[Abstract unavailable]  Keywords: American football; </p> <p>Language: en</p>",
language="en",
issn="0195-9131",
doi="10.1249/01.mss.0000273356.73640.df",
url="http://dx.doi.org/10.1249/01.mss.0000273356.73640.df"
}