Funding for this research was provided by:
Bundesamt für Gesundheit
Received: 14 December 2019
Accepted: 14 May 2020
First Online: 26 May 2020
Ethics approval and consent to participate
: The local ethics committee has exempted the study from approval because under Swiss law approval is not required for studies in which non-personal health-related data are collected (article 2 of the Swiss Federal Act on Research involving Human Beings, Federal Council. Federal Act on Research involving Human Beings. https:// ExternalRef removed. Accessed 9th Dec 2019).
: “Not Applicable”
: “Raphael Bonvin, Jan Breckwoldt, Kai Schnabel and & Sören Huwendiek are Associate Editors of BMC Medical Education”.“All the other authors declare that they have no competing interests”.