@article{ref1,
title="Blunt force violence in America--shades of gray or red. Ultimate/extreme fighting",
journal="JAMA journal of the American Medical Association",
year="1996",
author="Lundberg, G. D.",
volume="275",
number="21",
pages="1684-1685",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0098-7484",
doi="",
url="http://dx.doi.org/"
}