Received: 2 January 2020
Accepted: 17 March 2020
First Online: 26 March 2020
Ethics approval and consent to participate
: All data was extracted from an existing database and the EDTA-blood samples were obtained from our bio-bank of the diagnostic lab. Therefore no animal welfare committee approval was obtained according to the German Animal Welfare Law (released on 05/18/2006, last changes on 03/29/2017). The blood samples were collected and sent in by accredited veterinarians according to the national and international guidelines for animal welfare.
: Not applicable.
: The authors declare that they have no competing interests.