@article{ref1,
title="APOE epsilon4 allele and chronic traumatic brain injury",
journal="JAMA journal of the American Medical Association",
year="1997",
author="Gross, R.",
volume="278",
number="24",
pages="2143-2143",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0098-7484",
doi="",
url="http://dx.doi.org/"
}