@article{ref1,
title="Risk of concussion for athletes in contact sports at higher altitude vs at sea level: a meta-analysis-corrected-reply",
journal="JAMA neurology",
year="2017",
author="Zavorsky, Gerald S. and Smoliga, James M.",
volume="74",
number="4",
pages="485-486",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="2168-6149",
doi="10.1001/jamaneurol.2016.6068",
url="http://dx.doi.org/10.1001/jamaneurol.2016.6068"
}