@article{ref1,
title="Retirement and activity restrictions following concussion",
journal="Physical medicine and rehabilitation clinics of North America",
year="2016",
author="Laker, Scott R. and Meron, Adele and Greher, Michael R. and Wilson, Julie",
volume="27",
number="2",
pages="487-501",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="1047-9651",
doi="10.1016/j.pmr.2016.01.001",
url="http://dx.doi.org/10.1016/j.pmr.2016.01.001"
}