Funding for this research was provided by:
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung (155952, 184668)
Received: 11 December 2019
Accepted: 27 February 2020
First Online: 9 June 2020
Ethics approval and consent to participate
: All experiments were performed with permission of the local animal care committee (Canton of Fribourg, Switzerland) and the Cantonal Veterinary Office (SVet FR) and according to the present Swiss law and the European Communities Council Directive of 24 November 1986 (86/609/EEC).
: “Not applicable”
: The authors declare that they have no competing interests.