Funding for this research was provided by:
Guangdong Provincial Key Laboratory of Reproductive Medicine (2018GZR110105020)
Natural Science Foundation of Guangdong Province (2016A030313170, 2017A030313757)
National Natural Science Foundation of China (31671211)
Text and Data Mining valid from 2019-12-10
Received: 25 September 2019
Accepted: 26 November 2019
First Online: 10 December 2019
Compliance with Ethical Standards
: The authors declare that they have no conflict of interest.
: This article does not contain any studies with human participants or animals performed by any of the authors.