@article{ref1,
title="Kidney trauma in martial arts: a case report of kidney contusion in jujitsu",
journal="American journal of sports medicine",
year="2004",
author="Itagaki, Michael W. and Knight, Napoleon B.",
volume="32",
number="2",
pages="522-524",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0363-5465",
doi="",
url="http://dx.doi.org/"
}