@article{ref1,
title="Soccer and head injuries: what is the risk?",
journal="Neurology",
year="2017",
author="Allen, Baxter and Karceski, Steven",
volume="88",
number="9",
pages="e74-e77",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0028-3878",
doi="10.1212/WNL.0000000000003669",
url="http://dx.doi.org/10.1212/WNL.0000000000003669"
}