@article{ref1,
title="Mountain sickness",
journal="American journal of nursing",
year="1961",
author="Valdivia, E.",
volume="61",
number="",
pages="77-77",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0002-936X",
doi="",
url="http://dx.doi.org/"
}