Funding for this research was provided by:
National Natural Science Foundation of China (Grant No.81490745)
Major Program of the National Key Research and Development Program of Reproductive Health & Major Birth Defects Control and Prevention (Grant No. 2016YFC1000402)
State Key Development Program for Basic Research of China (Grant No.2015CB943304)
National Natural Science Foundation of China (Grant No. 81801467)
Article History
Received: 21 February 2020
Accepted: 24 August 2020
First Online: 3 September 2020
Compliance with ethical standards
:
: The authors report no conflict of interest.
: Ethical approval from Medical Faculty Ethics Committee Peking University First Hospital was obtained: Approval number: 2013[578], Date: 01/12/2013.