@article{ref1,
title="Trauma systems development",
journal="Annals of emergency medicine",
year="1992",
author="Johnson, J. C.",
volume="21",
number="2",
pages="168-169",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0196-0644",
doi="",
url="http://dx.doi.org/"
}