Funding for this research was provided by:
Universitätsklinikum Hamburg-Eppendorf (UKE)
Received: 10 July 2021
Accepted: 9 October 2021
First Online: 3 November 2021
: The local institutional committee on human research approved the study, and all volunteers gave their written informed consent prior to examination.
: Not applicable.
: The authors declare that they have no competing interests.