Received: 4 February 2020
Accepted: 28 May 2020
First Online: 3 June 2020
Ethics approval and consent to participate
: The study was carried out in compliance with the national animal welfare regulations. Diagnostic veterinary procedures are not within the context of relevant EU legislation for animal experimentation (Directive 86/609/EC) and may be performed in order to diagnose animal diseases and improve animal welfare. Samples were collected by registered veterinarians and caused no suffering. Samples were collected only after the owners’ consent had been obtained.
: Not applicable.
: The authors declare that they have no competing interests.