Funding for this research was provided by:
Received: 4 January 2021
Accepted: 18 August 2021
First Online: 31 August 2021
: This study was performed in line with the principles of the Declaration of Helsinki. Approval was granted by the local Ethics Committee of Ludwig-Maximilians-University Munich (07.02.2018, reference number 17–891).
: Not applicable.
: The authors declare that they have no competing interests.