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Authors
Willutzki, Ulrike https://orcid.org/0000-0002-0149-4554
Orlinsky, David E.
Hartmann, Armin
Rønnestad, Michael Helge
Schröder, Thomas
Pirke, Jan
Heinonen, Erkki
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Funding
Funding for this research was provided by:
Private Universität Witten/Herdecke gGmbH
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Article History
Received: 16 February 2026
Accepted: 2 July 2026
First Online: 24 August 2026
Declarations
Ethics approval and consent to participate: Training centers contributing to the study solicited ethics approval from their local ethics committees in accordance with the Declaration of Helsinki (further information about respective ethics approvals are available in supplement material). Trainees were informed about the study and informed consent was solicited from all participants in the study. They could withdraw from the study any time without explanation or any consequences; training centers did not get information about who participated in the study.
Consent for publication: Not applicable.
Competing interests: The authors declare no competing interests.
