@article{ref1,
title="Major causes of death during the past 25 years in China",
journal="Chinese medical journal",
year="2007",
author="Qin, Xue-jun and Shi, Huan-zhong",
volume="120",
number="24",
pages="2317-2320",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0366-6999",
doi="",
url="http://dx.doi.org/"
}