@article{ref1,
title="Is migraine a risk factor for the development of concussion?",
journal="British journal of sports medicine",
year="2006",
author="Gordon, K. E. and Dooley, J. M. and Wood, E. P.",
volume="40",
number="2",
pages="184-185",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0306-3674",
doi="10.1136/bjsm.2005.022251",
url="http://dx.doi.org/10.1136/bjsm.2005.022251"
}