@article{ref1,
title="Helicopter emergency medical service safety",
journal="Annals of emergency medicine",
year="2006",
author="Levick, Nadine",
volume="48",
number="5",
pages="635-6; author reply 636",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0196-0644",
doi="10.1016/j.annemergmed.2006.05.033",
url="http://dx.doi.org/10.1016/j.annemergmed.2006.05.033"
}