Funding for this research was provided by:
Received: 11 July 2019
Accepted: 23 January 2020
First Online: 3 February 2020
Ethics approval and consent to participate
: This experiment was approved by the Animal Care and Use Committee of the Veterinary Office of Zurich (ZH Veterinäramt Zürich, Zollstrasse 20, CH-8090 Zürich, Switzerland; experiment Nr. 27368, ZH003/16).
: Not applicable.
: The authors declare that they have no competing interests.