@article{ref1,
title="Concussion in professional football: reconstruction of game impacts and injuries",
journal="Neurosurgery",
year="2004",
author="Kundra, SN",
volume="55",
number="1",
pages="260; author reply 260-260; author reply 260",
abstract="unavailable.  Keywords: American football",
language="en",
issn="0148-396X",
doi="",
url="http://dx.doi.org/"
}