Acknowledgments
The authors would like to acknowledge support from the “111 program”
of the Ministry of Education PRC and the State Administration of Foreign
Experts Affairs PRC. This work was financially supported by the National
Key Research and Development Program of Reproductive Health & Major
Birth Defects Control and Prevention (No. 2016YFC1000407), the National
Natural Science Foundation of China for Youth (81601304), the Key
Program of International Cooperation of NSFC (81520108013), the Ph.D.
Programs Foundation of the Ministry of Education of China
(2013550311003), and the General Program of the National Natural Science
Foundation of China (81471472).
Data sharing
The data used and analyzed during the current study are available from
the corresponding author on reasonable request.