@article{ref1,
title="Stress fracture of the ulna in a male competitive polo player",
journal="American journal of sports medicine",
year="2002",
author="Clark, Russell J. and Sizer, Phillip S. and Slauterbeck, James",
volume="30",
number="1",
pages="130-132",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0363-5465",
doi="",
url="http://dx.doi.org/"
}