Mao, Guangming
Zhu, Wenming
Mo, Zhe
Wang, Yuanyang
Wang, Xiaofeng
Lou, Xiaoming
Wang, Zhifang
Funding for this research was provided by:
the Health and Family Planning Commission of Zhejiang Province (2014KYB325)
the Zhejiang Province Commission of population Family Planning (JSW2013-B010)
Article History
Received: 24 October 2016
Accepted: 27 July 2018
First Online: 3 August 2018
Ethics approval and consent to participate
: The protocols used in this study were approved by the Ethics Committee of Zhejiang Provincial Center for Disease Control and Prevention (ZJB-2015004, ZJB-2013117). Written informed contents were obtained from each participant or her guardian if she was less than 18 years old.
: Not applicable.
: The authors declare that they have no competing interests.
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