@article{ref1,
title="Safety in numbers for walkers and bicyclists: exploring the mechanisms",
journal="Injury prevention",
year="2015",
author="Jacobsen, Peter Lyndon and Ragland, David R. and Komanoff, Charles",
volume="21",
number="4",
pages="217-220",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="1353-8047",
doi="10.1136/injuryprev-2015-041635",
url="http://dx.doi.org/10.1136/injuryprev-2015-041635"
}