@article{ref1,
title="Return to collision sport after pneumomediastinum",
journal="Current sports medicine reports",
year="2012",
author="Olson, Ronald P.",
volume="11",
number="2",
pages="58-63",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="1537-890X",
doi="10.1249/JSR.0b013e3182499f55",
url="http://dx.doi.org/10.1249/JSR.0b013e3182499f55"
}