@article{ref1,
title="Bicycle helmet legislation: evidence for effectiveness",
journal="Pediatric research",
year="2002",
author="Macarthur, Colin and Macpherson, Alison Katherine",
volume="52",
number="4",
pages="472-472",
abstract="Abstract unavailable.",
language="",
issn="0031-3998",
doi="",
url="http://dx.doi.org/"
}