Funding for this research was provided by:
Deutsche Forschungsgemeinschaft (PI 377/17-1)
Text and Data Mining valid from 2019-04-15
Received: 30 October 2018
Accepted: 5 April 2019
First Online: 15 April 2019
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: The authors declare that the experiments comply with the current laws of the countries in which the experiments were performed.