Funding for this research was provided by:
Universitätsklinikum Bonn
Article History
Accepted: 26 May 2020
First Online: 11 June 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: This article does not contain any studies with human participants or animals performed by any of the authors. The Regional Committee for Medical and Health Research Ethics has given ethical approval for the Norwegian study. The presented German results comply with the Non-disclosure Agreement of the German Federal Statistical Office, which examined the results for potential non-disclosure violations before final approval and resubmission to the authors.