@article{ref1,
title="The role of rollovers",
journal="JEMS: a journal of emergency medical services",
year="2009",
author="",
volume="34",
number="9",
pages="16; discussion 16-16; discussion 16",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0197-2510",
doi="",
url="http://dx.doi.org/"
}