Funding for this research was provided by:
Universität zu Köln
Article History
Received: 20 February 2021
Accepted: 20 April 2021
First Online: 13 May 2021
Declarations
:
: Ethical approval for this study was obtained from the Ethics Commission of the Faculty of Medicine of Cologne University (Approval Number 16–396).
: Not applicable.
: The authors declare no competing interests.