Funding for this research was provided by:
Bundesministerium für Bildung und Forschung (01GL1723)
Received: 16 October 2020
Accepted: 8 June 2021
First Online: 21 July 2021
: The project received ethical approval through the Institutional Review Board of the Medical Faculty of the University of Cologne, Germany (n° 17–406). All participants were fully informed about the study and provided written and oral consent to participate.
: Not applicable.
: The authors declare that they have no conflict of interest.