Funding for this research was provided by:
Received: 11 February 2021
Accepted: 28 June 2021
First Online: 7 July 2021
: No ethical approval was required according to Swiss Law. Nevertheless, a clarification of responsibility was obtained from the Ethics Committee Zurich (BASEC-No.: Req-2020-00783).
: Not applicable.
: The authors declare that they have no competing interests.