Funding for this research was provided by:
Universität des Saarlandes
Received: 21 February 2022
Accepted: 31 July 2022
First Online: 3 September 2022
: The study was conducted in accordance with the ethical standards of the ethics committee of Saarland University and the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. According to the ethics committee of Saarland University the study was exempt of ethical approval.
: Not applicable.
: The authors declare that they have no competing interests.