Funding for this research was provided by:
Merck Animal Health
Received: 2 October 2020
Accepted: 12 January 2021
First Online: 22 January 2021
Ethics approval and consent to participate
: Evaluation of data was based on samples and questionnaires that have already been taken in another, already published study [CitationRef removed]. No new sampling was performed.
: Not applicable.
: The authors declare that they have no competing interests.