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Article History

Received: 4 April 2020

Accepted: 17 August 2020

First Online: 24 August 2020

Ethics approval and consent to participate

: Sampling was performed during post-mortem investigations and complies with national legislation (Tierversuchsgesetz – TVG 2012, §1). Furthermore, the study was performed in co-operation with veterinarians in charge of the respective farms who have agreements with farm owners for applying veterinary procedures.

: Not applicable.

: The authors declare that they have no competing interests.