Funding for this research was provided by:
Hochschule für Angewandte Wissenschaften Hamburg (HAW Hamburg)
Received: 29 March 2020
Accepted: 4 October 2020
First Online: 14 October 2020
Compliance with ethical standards
: The authors declare that they have no conflicts of interest.
: Not applicable.
: All authors gave their consent to participate.
: All authors gave their consent for publication.