@article{ref1,
title="Altitude does not reduce concussion incidence in professional football players: a poor understanding of health statistics and altitude physiology",
journal="Journal of orthopaedic and sports physical therapy",
year="2014",
author="Zavorsky, Gerald S.",
volume="44",
number="6",
pages="458-459",
abstract="<p>[Abstract unavailable]  Keywords: American football; </p> <p>Language: en</p>",
language="en",
issn="0190-6011",
doi="10.2519/jospt.2014.0201",
url="http://dx.doi.org/10.2519/jospt.2014.0201"
}