Liu, Jianbing
Li, Yunfeng
Chen, Xihua
Xu, Xiangbo
Zhao, Haoqi
Wang, Shufang
Hao, Jianqing
He, Bin http://orcid.org/0000-0003-3684-8858
Liu, Shuyan
Wang, Jiedong
Funding for this research was provided by:
Beijing Municipal Natural Science Foundation (7142126)
Beijing Municipal Natural Science Foundation (7152115)
Natural Science Foundation of Guangxi (2016GXNSFAA380187)
Science Research Start-up Fund for Doctor of Shanxi Medical University (03201502)
Article History
Received: 25 June 2019
Accepted: 1 October 2020
First Online: 27 October 2020
Ethics approval and consent to participate
: Ethical approval was provided by the Ethics Committee of the National Research Institute for Family Planning and written informed consent was obtained from all participants. The number of the ethical approval is 201411. Samples and data were handled according to the declaration of Helsinki.
: Not applicable.
: The authors declare that they have no competing interests.