Funding for this research was provided by:
National key research and development program (2016YFD0501206)
National High Technology Research and Development Program 863 (2013AA102806)
National Natural Science Foundation of China (31360630, 31460681, and 31372494)
Jilin Province Science Foundation for Youths (20160520063JH)
Received: 22 January 2018
Accepted: 16 April 2018
First Online: 19 April 2018
Ethics approval and consent to participate
: The farm owner and our research team made an agreement in a written way. The ethical review committee approved this agreement. Furthermore, the study was approved by the farm owner and all experimental animals were conducted according to the International Guiding Principles for Biomedical Research. The protocol was approved by the Committee on the Ethics of Animal Experiments of the Jilin University.
: The authors declare that they have no competing interests.
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