Funding for this research was provided by:
Deutsche Forschungsgemeinschaft (BA4858/2-1)
Free State of Thuringia, co-financed by European Union funds under the European regional Development Fund (2017 FE 9128)
Received: 28 December 2019
Accepted: 9 September 2020
First Online: 16 September 2020
: The authors declare that they have no competing interests.