Yu, Yongquan
Yao, Shen
Dong, Huibin
Ji, Minghui
Chen, Zhiyong
Li, Guiying
Yao, Xingjuan
Wang, Shou-Lin
Zhang, Zhan http://orcid.org/0000-0002-9685-5753
Funding for this research was provided by:
the Natural Science Foundation of China (81502801)
a project funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions
a collegiate Natural Science Foundations of Jiangsu province (16KJB330005)
the science and technology support program funded by Changzhou Municipal Science and Technology Bureau (CE20145046)
the Science and Technique Foundation for Youths by Health and Family Planning Commission of Changzhou
Article History
Received: 17 August 2017
Accepted: 7 May 2018
First Online: 28 May 2018
Compliance with ethical standards
: The present study was approved by the Institutional Review Board of Changzhou Center for Disease Control and Prevention, and all procedures were in accordance with prevailing ethical principles.
: The authors declare that they have no conflict of interest.