Funding for this research was provided by:
National Key R&D Program (2016YFD0500100)
National Natural Science Foundation of China (31502097)
Foundation of Nanyang Normal University (15082)
Scientific and Technological Project of Henan Province (182102110240)
Received: 18 September 2017
Accepted: 29 May 2018
First Online: 25 June 2018
Ethics approval and consent to participate
: Experimental animals used in the study were cared for in accordance with the internationally accepted standards for the care and handling of laboratory animals. This study was granted approval by the Animal Ethics Committee of School of Harbin Veterinary Research Institute of the Chinese Academy of Agricultural Sciences. The Animal Ethics Committee approval number was SYXK (Hei) 2,011,022.
: The authors declare that they have no competing interests.
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