@article{ref1,
title="American Medical Society for Sports Medicine position statement on concussion in sport: erratum",
journal="Clinical journal of sport medicine",
year="2019",
author="",
volume="29",
number="3",
pages="256-256",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="1050-642X",
doi="10.1097/JSM.0000000000000764",
url="http://dx.doi.org/10.1097/JSM.0000000000000764"
}