Funding for this research was provided by:
Foundation of the Health Department of Guangxi Province, China (No.2010083, No.2016414)
the Foundation of the Nature Science Fund (20140930)
Text and Data Mining valid from 2019-12-01
Received: 28 June 2019
Accepted: 19 November 2019
First Online: 3 December 2019
Ethics approval and consent to participate
: The experiment was approved by Center of Reproductive medicine, Affiliated hospital of Youjiang Medical College for Nationalities.
: Not applicable.
: The authors declare that they have no competing interests.