Received: 18 June 2021
Accepted: 19 October 2021
First Online: 8 November 2021
: All samples were collected at The Large Animal Teaching Hospital at The University of Copenhagen, Denmark, in 2018. Approval was obtained from the ethical board of the Department of Veterinary Clinical Sciences, University of Copenhagen, as was written consent from the owners of the horses. All procedures were carried out in accordance with the ARRIVE guidelines.
: Not applicable.
: The authors declare that they have no competing interests.