@article{ref1,
title="Developing return-to-play guidelines following mild traumatic brain injury",
journal="Journal of science and medicine in sport",
year="2003",
author="Stevenson, Mark R.",
volume="6",
number="4",
pages="519-520",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="1440-2440",
doi="",
url="http://dx.doi.org/"
}