Funding for this research was provided by:
Received: 12 June 2020
Accepted: 26 April 2021
First Online: 11 May 2021
: The study was approved by the ethics committee of the Ludwig-Maximilians-University (LMU) Munich, Germany (“Ethikkommission der Medizinischen Fakultät der LMU”), approval number 20–268 KB.
: Not applicable.
: The authors declare that they have no competing interests.