@article{ref1,
title="Universal bicycle helmet use",
journal="Annals of emergency medicine",
year="2011",
author="",
volume="58",
number="1",
pages="114-115",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0196-0644",
doi="10.1016/j.annemergmed.2011.05.008",
url="http://dx.doi.org/10.1016/j.annemergmed.2011.05.008"
}