@article{ref1,
title="Concussion",
journal="Canadian family physician",
year="2004",
author="Hickey, John",
volume="50",
number="",
pages="231-233",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0008-350X",
doi="",
url="http://dx.doi.org/"
}