Freitag, Wolfgang http://orcid.org/0000-0002-7740-5298
Yolcu, Nadja-Mira http://orcid.org/0000-0002-7894-1623
Funding for this research was provided by:
Fritz Thyssen Stiftung
Article History
Received: 18 May 2020
Accepted: 24 December 2020
First Online: 18 January 2021
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.