@article{ref1,
title="Migraines and high-altitude headaches",
journal="Wilderness and environmental medicine",
year="2003",
author="Miller, Jacky A. and Gray, Jennifer",
volume="14",
number="4",
pages="286-287",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="1080-6032",
doi="",
url="http://dx.doi.org/"
}