Funding for this research was provided by:
National Basic Research Program of China (973 Program) (2017YFD050080)
China Agricultural Research System (CARS-42-17)
Sichuan Veterinary Medicine and Drug Innovation Group of China Agricultural Research System (CARS-SVDIP)
International S&T Cooperation Program of Sichuan Province (2017HH0026)
Science and Technology Innovation Program of Guizhou Academy of Agricultural Science ((2017)03)
Text and Data Mining valid from 2019-12-01
Received: 11 May 2019
Accepted: 22 November 2019
First Online: 3 December 2019
Ethics approval and consent to participate
: The Animal Ethics Committee of the Sichuan Agricultural University waived the need for ethics approval and the need to obtain informed consent for the sample collection.
: Not applicable.
: The authors declare no conflicts of interest.