Received: 27 October 2020
Accepted: 8 December 2020
First Online: 17 December 2020
Ethics approval and consent to participate
: Approved by the Ethics committee of the MHH, following the Helsinki Declaration of 1975 (No. 7374), as well as the Commissioner for Data Protection at MHH.
: All co-authors have read the text and approved the publication.
: The authors declare no conflict of interest.