Funding for this research was provided by:
Bundesministerum für Bildung und Forschung (01PK1501A/B/C)
Received: 26 November 2019
Accepted: 2 March 2020
First Online: 20 March 2020
Ethics approval and consent to participate
: The study was performed in accordance with the Declaration of Helsinki and the Ethics Committee of the Chamber of Physicians (Ethik-Kommission, Ärztekammer Hamburg), Hamburg, approved this study and confirmed its innocuousness. The study included written consent by the participants and participation was voluntary and anonymized (reference number: PV3649).
: Not applicable.
: SH has a position as Section Editor to BMC Medical Education. MK has a position as Associate Editor to BMC Medical Education. JG and POB have no competing interests.