@article{ref1,
title="A survey on mental health among traffic policemen in Tianjin",
journal="Zhonghua Liu Xing Bing Xue Za Zhi",
year="2012",
author="Tian, Feng-shi and Yan, Jun and Peng, Jia and Wu, Yan and Zhao, Zi-Qin and Yue, Song",
volume="33",
number="10",
pages="1095-1096",
abstract="<p>[Abstract unavailable]</p> <p>Language: zh</p>",
language="zh",
issn="0254-6450",
doi="",
url="http://dx.doi.org/"
}