Funding for this research was provided by:
Technische Universität Dortmund
Received: 19 May 2021
Accepted: 18 November 2021
First Online: 11 December 2021
: Not applicable.
: Permission was obtained from the subjects in Figs. InternalRef removed & InternalRef removed for the inclusion of these photographs in the publication.
: The authors declare no conflict of interest.