Article History
Received: 5 July 2020
Accepted: 26 November 2020
First Online: 17 December 2020
Ethics approval and consent to participate
: The study was conducted according to the ethical guidelines of the University of Veterinary Medicine, Hannover, Germany. All samples were remains of diagnostic tests obtained with written owners’ consent or from a granted animal experiment (animal experiment reference number: 33.8–42502-05-18A290). The study was approved by the Universities thesis committee. According to national regulations no further ethics approval was necessary.
: Not applicable.
: The authors declare that they have no competing interests that might have influenced the content of the manuscript.