Funding for this research was provided by:
Received: 19 July 2021
Accepted: 23 December 2021
First Online: 8 February 2022
: All procedures performed in this study were in accordance with the ethical standards of the ethics committee of Ulm University, Ulm, Germany (reference number: 25/18) and with the 1964 Helsinki declaration and its later amendments. Ethics approval for this study was obtained from the ethics committee of Ulm University, Ulm, Germany (reference number: 25/18). Informed consent of the participants was obtained after the procedures had been fully explained.
: Not applicable.
: The authors declare that they have no competing interests.