Received: 2 October 2019
Accepted: 20 July 2020
First Online: 11 August 2020
Change Date: 21 September 2020
Change Type: Correction
Change Details: An amendment to this paper has been published and can be accessed via the original article.
Ethics approval and consent to participate
: Was granted by the ethics committee of the University of Applied Science and Art (Hildesheim) dated 06/12/2017. Participants gave written informed consent before data collection began.
: Not applicable.
: The authors declare that they have no competing interests.