@article{ref1,
title="Severe traumatic brain injury",
journal="Neurosurgery",
year="2018",
author="Penn, David L. and Chi, John H. and Proctor, Mark R.",
volume="82",
number="1",
pages="N9-N10",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0148-396X",
doi="10.1093/neuros/nyx539",
url="http://dx.doi.org/10.1093/neuros/nyx539"
}