@article{ref1,
title="Have Zackery Lystedt concussion laws made an impact?",
journal="Journal of pediatrics",
year="2019",
author="Fisher, Paul G.",
volume="206",
number="",
pages="2-3",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0022-3476",
doi="10.1016/j.jpeds.2019.01.019",
url="http://dx.doi.org/10.1016/j.jpeds.2019.01.019"
}