@article{ref1,
title="An adolescent football player with chest pain",
journal="Clinical pediatrics",
year="2003",
author="Kahn, Daniel A.",
volume="42",
number="5",
pages="471; discussion 471-3",
abstract="<p>[Abstract unavailable]  Keywords: American football  </p> <p>Language: en</p>",
language="en",
issn="0009-9228",
doi="",
url="http://dx.doi.org/"
}