@article{ref1,
title="The incidence and significance of shock in head injury",
journal="Annals of surgery",
year="1953",
author="Campbell, E. and Whitfield, R. D.",
volume="138",
number="5",
pages="698-705",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0003-4932",
doi="",
url="http://dx.doi.org/"
}