Funding for this research was provided by:
Norwegian Research Council (207568)
Received: 1 February 2019
Accepted: 25 November 2019
First Online: 3 December 2019
Ethics approval and consent to participate
: This study did not require official or institutional ethical approval. All animals were cared for in line with laws, internationally recognized guidelines and regulations for keeping pigs in Norway (The Animal Protection Act of December 20th, 1974, the Animal Welfare Act of June 19th, 2009 and the Regulations for keeping of pigs in Norway of February 18th, 2003). The animals used in this study were AI boars kept as a routine by Norsvin’s breeding program.
: Not applicable.
: The authors declare that they have no competing interests.