@article{ref1,
title="Progressive retrograde amnesia in concussed football players: observation shortly postimpact",
journal="Neurology",
year="1970",
author="Yarnell, P. R. and Lynch, S.",
volume="20",
number="4",
pages="416-417",
abstract="<p>[Abstract unavailable]  Keywords: American football; </p> <p>Language: en</p>",
language="en",
issn="0028-3878",
doi="",
url="http://dx.doi.org/"
}