@article{ref1,
title="Heavily polluted cities attempt to curb traffic emissions",
journal="Lancet. Respiratory medicine",
year="2016",
author="Kirby, Tony",
volume="4",
number="3",
pages="183-184",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="2213-2600",
doi="10.1016/S2213-2600(16)00021-7",
url="http://dx.doi.org/10.1016/S2213-2600(16)00021-7"
}