Kara, David Delil http://orcid.org/0000-0002-9745-5321
Ring, Matthias http://orcid.org/0000-0003-3601-3228
Hennig, Friedrich Frank
Michelson, Georg
Article History
Received: 12 December 2019
Accepted: 12 June 2020
First Online: 23 June 2020
Compliance with Ethical Standards
:
: Georg Michelson is the owner of Talkingeyes & More GmbH. David Delil Kara, Matthias Ring, and Friedrich Frank Hennig declare that they have no conflict of interest.