https://actavetscand.biomedcentral.com/articles/10.1186/s13028-014-0046-2
https://actavetscand.biomedcentral.com/articles/10.1186/s13028-014-0048-0
https://actavetscand.biomedcentral.com/articles/10.1186/s13028-014-0041-7
https://actavetscand.biomedcentral.com/articles/10.1186/s13028-014-0047-1
https://actavetscand.biomedcentral.com/articles/10.1186/s13028-014-0042-6
https://actavetscand.biomedcentral.com/articles/10.1186/1751-0147-56-39