Funding for this research was provided by:
Johann Wolfgang Goethe-Universität, Frankfurt am Main
Received: 5 March 2020
Accepted: 22 December 2020
First Online: 2 April 2021
: The ethics committee of the University Hospital Frankfurt approved all study procedures. The study was carried out following the rules of the Declaration of Helsinki.
: Not applicable.
: The authors declare that they have no competing interests.