@article{ref1,
title="Footballer's migraine",
journal="American heart journal",
year="1973",
author="Matthews, W. B.",
volume="85",
number="2",
pages="279-280",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0002-8703",
doi="",
url="http://dx.doi.org/"
}