@article{ref1,
title="Mouth guards prevent most oral injuries in contact sports",
journal="New York journal of dentistry",
year="1974",
author="Koplik, B. and Koplik, M.",
volume="44",
number="3",
pages="84-85",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0028-7296",
doi="",
url="http://dx.doi.org/"
}