@article{ref1,
title="Diagnosis and management of concussion in sports",
journal="Neurology",
year="1997",
author="Kelly, James P. and Rosenberg, J. H.",
volume="48",
number="3",
pages="575-580",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0028-3878",
doi="",
url="http://dx.doi.org/"
}