Funding for this research was provided by:
China Scholarship Council
Danish Pig Levy Fund (RASP)
Text and Data Mining valid from 2020-02-12
Received: 12 August 2019
Accepted: 15 December 2019
First Online: 12 February 2020
Ethics approval and consent to participate
: The present experiment complied with Danish law on the humane care and use of animals in research (The Danish Ministry of Justice, 1995), and the research protocols were approved by The Danish Animal Experimentation Inspectorate.
: Not applicable.
: The authors declare that they have no competing interests.