Received: 30 March 2020
Accepted: 30 October 2020
First Online: 17 November 2020
Ethics approval and consent to participate
: Ethical approval for the Delphi survey was obtained from the ethics committee of the Medical Faculty of the University of Heidelberg, May 15, 2017 (Approval No. S- 087/2017).All participants received written information in advance about the survey process and the aim of the study. They expressly agreed in writing to participate.
: Not applicable.
: The authors declare that they have no competing interests.