@article{ref1,
title="Attribution of concussion-like symptoms and history of collision sports exposure",
journal="JAMA pediatrics",
year="2016",
author="Comrie, Don",
volume="170",
number="4",
pages="399-400",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="2168-6211",
doi="10.1001/jamapediatrics.2015.4646",
url="http://dx.doi.org/10.1001/jamapediatrics.2015.4646"
}