Dongliu, Yuan
Guoliang, Yang
Haocheng, Xu
Shuaijia, Qing
Li, Bing http://orcid.org/0000-0002-2211-0230
Yanglei, Jia
Funding for this research was provided by:
the China Postdoctoral Science Foundation (2012M521933)
Article History
Received: 2 November 2015
Accepted: 23 June 2016
First Online: 28 June 2016
Compliance with ethical standards
: This study was approved by the Review Board of the Jinan Junqu Center for Disease Control and Prevention. Informed consent was received from all participants before the study.
: The authors declare that they have no competing interests.
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