@article{ref1,
title="Delayed presentation after head injury: is a computed tomography scan necessary?",
journal="Academic emergency medicine",
year="1999",
author="Hemphill, R. R. and Santen, S. A. and Kleinschmidt, P. E.",
volume="6",
number="9",
pages="957-960",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="1069-6563",
doi="",
url="http://dx.doi.org/"
}