@article{ref1,
title="Traffic and cardiovascular disease: the challenge of estimating exposure",
journal="Occupational and environmental medicine",
year="2009",
author="Vedal, Sverre",
volume="66",
number="12",
pages="787-788",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="1351-0711",
doi="10.1136/oem.2009.048306",
url="http://dx.doi.org/10.1136/oem.2009.048306"
}