Received: 25 June 2021
Accepted: 3 January 2022
First Online: 11 January 2022
: Not applicable.
: All authors approve the publication.
: There are no competing interests. WD was employed by the company Dalberg Advisors in Switzerland. The remaining authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.