Funding for this research was provided by:
National Natural Science Foundation of China (31772637, 31301981)
the Program of State Key Laboratory of Animal Nutrition of China and China Postdoctoral Science Foundation Grant (2016M600871)
Text and Data Mining valid from 2018-05-16
Received: 19 October 2017
Accepted: 17 April 2018
First Online: 16 May 2018
Ethics approval and consent to participate
: Swine were cared for in accordance with the guidelines for the care and use of laboratory animals presented in the guide issued by the National Institute of Health and by China’s Ministry of Agriculture. This study was approved by the Animal Care and Use Committee of the China Agricultural University.
: The authors declare that they have no competing interests.