Funding for this research was provided by:
Deutsche Forschungsgemeinschaft (DFG KI 804/3-2)
Text and Data Mining valid from 2018-04-13
Received: 16 October 2017
Accepted: 11 April 2018
First Online: 13 April 2018
Compliance with ethical standards
: MK declares that he has no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants included in the study.