Funding for this research was provided by:
National Natural Science Foundation of China (ID0E61AE8001)
Postdoctoral Science Foundation of Jiangsu Province (ID0EO2AE8002)
Text and Data Mining valid from 2018-11-08
Received: 28 June 2018
Accepted: 17 October 2018
First Online: 8 November 2018
Ethics approval and consent to participate
: The study protocol was approved by the Ethical Committee of Third Military Medical University (Chongqing, China) and was permitted by the owners of sampled dairy farm. Every effort was made to minimize animal suffering.
: Not applicable.
: The authors declare that they have no competing interests.
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