Funding for this research was provided by:
Bundesamt für Lebensmittelsicherheit und Veterinärwesen (1.18.10)
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung (177378)
Received: 15 January 2020
Accepted: 29 May 2020
First Online: 23 June 2020
Ethics approval and consent to participate
: The research was conducted in accordance with the Declaration of Helsinki and national standards. The study protocol was approved by the ethics committee of the Canton of Berne, Switzerland (KEK-BE Nr.: 2018–00866). Written informed consent to participate was obtained from all participants.
: Written informed consent for publication was obtained from all participants.
: The authors declare that they have no competing interests.