@article{ref1,
title="Football and altitude: a FIFA vision",
journal="British journal of sports medicine",
year="2013",
author="D'Hooghe, Michel",
volume="47",
number="Suppl 1",
pages="i1-i1",
abstract="<p>[Abstract unavailable]  KW: Soccer</p> <p>Language: en</p>",
language="en",
issn="0306-3674",
doi="",
url="http://dx.doi.org/"
}