Article History
Received: 1 September 2020
Revised: 24 October 2020
Accepted: 31 October 2020
First Online: 11 November 2020
Compliance with ethical standards
:
: Eva-Maria Kahle, Martin Zarnkow and Fritz Jacob declare that they have no conflict of interest.
: The authors Eva-Maria Kahle, Martin Zarnkow and Fritz Jacob hereby confirm that this manuscript is performed according to and follows the COPE guidelines and has not already been published nor is it under consideration for publication elsewhere. This article does not contain any studies with human or animal subjects.