Funding for this research was provided by:
Received: 1 June 2021
Accepted: 22 November 2021
First Online: 15 December 2021
: This pilot study was approved by the Ethical Review Committee of Ulm University (No. 354/15). It conforms with the Declaration of Helsinki and all participants gave written informed consent to participate prior to taking part in this study.
: Not applicable.
: The authors declare that they have no financial or non-financial competing interests.