Funding for this research was provided by:
Henan Province Natural Science Planning Fund Projects (grant no. 162300410128)
Henan Province Science and Technology Open Cooperation Project (grant no. 182106000042)
the Veterinary Discipline Key Construction Project of Henan University of Animal Husbandry and Economy (grant no. MXK2016102)
Article History
Received: 19 May 2018
Accepted: 21 September 2018
First Online: 25 September 2018