Funding for this research was provided by:
Hochschule Wismar, University of Applied Sciences: Technology, Business and Design
Received: 27 October 2019
Revised: 5 April 2020
Accepted: 12 May 2020
First Online: 25 May 2020
Conflict of interest
: G. Prause and E.O. Olaniyi declare that they have no competing interests.