@article{ref1,
title="Promoting physical activity and reducing child pedestrian risk: early evaluation of a walking school bus program in central Seattle",
journal="Journal of trauma",
year="2006",
author="Johnston, Brian Duncan and Mendoza, J. and Rafton, S and Gonzalez-Walker, Denise and Levinger, David",
volume="60",
number="6",
pages="1388-1389",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0022-5282",
doi="",
url="http://dx.doi.org/"
}