@article{ref1,
title="Flying and hypoxaemia at altitude. Cabin altitude should have been recorded",
journal="British medical journal: BMJ",
year="1994",
author="Arnstein, F.",
volume="308",
number="6926",
pages="474-474",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0959-8138",
doi="",
url="http://dx.doi.org/"
}