Received: 14 January 2021
Accepted: 28 April 2021
First Online: 17 May 2021
: The study design and protocols were reviewed and approved by the Cantonal Veterinary Office of Zurich (permission number ZH168/16). All applicable national, and/or institutional guidelines for the care and use of animals were followed.
: Not applicable.
: The authors declare that they have no competing interests.