@article{ref1,
title="Traumatic brain injury: a global challenge",
journal="Lancet neurology",
year="2017",
author="Johnson, Walter D. and Griswold, Dylan P.",
volume="16",
number="12",
pages="949-950",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="1474-4422",
doi="10.1016/S1474-4422(17)30362-9",
url="http://dx.doi.org/10.1016/S1474-4422(17)30362-9"
}