@article{ref1,
title="Return to sports after concussion",
journal="Sports health",
year="2017",
author="Wojtys, Edward M.",
volume="9",
number="4",
pages="303-304",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="1941-7381",
doi="10.1177/1941738117714157",
url="http://dx.doi.org/10.1177/1941738117714157"
}