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Authors
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Funding
Funding for this research was provided by:
the National Key Research and Development Program (2016YFC1000300, 2016YFC1000307, 2016YFC1000803, 2017YFC1002000)
the Non-profit Central Research Institute Fund of National Research Institute For Family Planning (2019GJM04)
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Article History
Received: 25 December 2019
Accepted: 30 March 2020
First Online: 9 April 2020
Compliance with ethical standards
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: The authors declare that they have no conflict of interest.
: This study was approved by the ethics committee of the National Research Institute for Family Planning (record number: 2201512). All procedures involving human participants were performed in accordance with institutional and/or national research committee ethical standards, and performed in accordance with the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards.
: Informed consent was obtained from a volunteer of Chinese Han male.
