Funding for this research was provided by:
National Natural Science Foundation of China (31770106)
National Basic Research Program of China (973 Program) (2012CB722301)
the Cooperative Innovation Center of Engineering and New Products for Developmental Biology of Hunan Province (20134486)
Text and Data Mining valid from 2020-02-11
Received: 6 November 2019
Accepted: 5 February 2020
First Online: 11 February 2020
Ethics approval and consent to participate
: Ethical approval “All applicable international, national, and/or institutional guidelines for the care and use of animals were followed.” All procedures performed in studies involving animals were in accordance with the ethical standards of the Animal Care Committee of Hunan Normal University at which the studies were conducted.
: Not applicable.
: The authors declare that they have no competing interests.