Funding for this research was provided by:
National Natural Science Foundation of China (31472109)
Text and Data Mining valid from 2018-11-05
Received: 28 May 2018
Accepted: 19 September 2018
First Online: 5 November 2018
Ethics approval and consent to participate
: All procedures involving animals were approved by the Animal Care and Use Committee of Animal Nutrition Institute, Sichuan Agricultural University.
: Not applicable.
: The authors declare that they have no competing interests. All authors agreed to publish this paper.