Funding for this research was provided by:
Allianz Industrie Forschung (AiF 18355 N)
Text and Data Mining valid from 2020-01-11
Received: 17 October 2019
Revised: 26 November 2019
Accepted: 9 December 2019
First Online: 11 January 2020
Compliance with ethical standards
: No human or animal subjects were used in the study. No informed consent was required for this study.
: The authors declare that they have no conflict of interest.