Funding for this research was provided by:
Deutsche Forschungsgemeinschaft (RE 3198/6-1, RE 3198/6-1, RE 3198/6-1, EXC-2046/1, EXC-2046/1, EXC-2046/1)
Received: 12 July 2019
Revised: 6 December 2019
Accepted: 12 December 2019
First Online: 10 January 2020
Conflict of interest
: Dr. Axel Fischer is co-founder of “Axel Fischer und Felix Kaschura GbR” which provided the measurement software “SweepMe!” (sweep-me.net). The name of the program is given in the manuscript. The other authors declare that they have no conflict of interest.