@article{ref1,
title="What is 'major trauma?'",
journal="Annals of emergency medicine",
year="1990",
author="Valenzuela, T. D.",
volume="19",
number="12",
pages="1470-1471",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0196-0644",
doi="",
url="http://dx.doi.org/"
}