Funding for this research was provided by:
Deutsche Forschungsgemeinschaft (HA-5447/12-1)
Universität zu Köln
Article History
Received: 30 April 2021
Accepted: 10 December 2021
First Online: 24 December 2021
Declarations
:
: The authors declare no conflict of interest.
: The study was approved by the appropriate institutional research ethics committee (Ethikkommission der Humanwissenschaftlichen Faklultät der Universität zu Köln). All procedures performed in studies involving human participants were in accordance with the ethical standards of the national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all participants.