Funding for this research was provided by:
National Natural Science Foundation of China (31801207)
Article History
Received: 20 April 2021
Accepted: 4 July 2021
First Online: 13 July 2021
Declarations
:
: The Ethics Committee of Tongde Hospital of Zhejiang Province approved all the protocols of the study.
: All participants provided written informed consent for the use of placental villus tissues.
: The author declares that all work described here has not been published before and that its publication has been approved by all co-authors.
: The authors declare no competing interests.