@article{ref1,
title="Cycle injury trends: helmets are most likely explanation",
journal="British medical journal: BMJ",
year="2001",
author="Sheikh, A. and Cook, Angus",
volume="322",
number="7299",
pages="1427-1428",
abstract="Abstract unavailable.",
language="",
issn="0959-8138",
doi="",
url="http://dx.doi.org/"
}