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Authors
Jia, Jiajing
Yang, Ying
Liu, Fangchao
Zhang, Minjin
Xu, Qin
Guo, Tonglei
Wang, Long
Peng, Zuoqi
He, Yuan
Wang, Yuanyuan
Zhang, Ya
Zhang, Hongguang
Shen, Haiping
Zhang, Yiping
Yan, Donghai
Ma, Xu https://orcid.org/0000-0001-7674-3589
Zhang, Puhong
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Funding
Funding for this research was provided by:
National Key Research and Development Program of Reproductive Health & Major Birth Defects Control and Prevention (2016YFC1000307)
CAMS Innovation Fund for Medical Sciences (2018-I2M-1-004)
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Article History
Received: 21 October 2020
Accepted: 8 March 2021
First Online: 19 March 2021
Declarations
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: The current study was conducted according to the guidelines laid down in the Declaration of Helsinki, and all procedures were approved by the Institutional Research Review Board at the National Research Institute for Family Planning, China. Written informed consent was obtained from all study participants.
: Not applicable.
: The authors declare that they have no competing interests.
