Funding for this research was provided by:
Weidenhammer Zöbele foundation
Received: 25 December 2020
Accepted: 1 March 2021
First Online: 19 April 2021
: All participants were informed in advance and gave their written consent. The study was approved by the ethics committee of the Charité (EA2/038/14 from 12th Aug 2015) and the data protection regulations were followed.
: Not applicable.
: The authors declare that they have no competing interests.