Funding for this research was provided by:
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung (PP001-110644)
Text and Data Mining valid from 2019-08-14
Received: 26 April 2019
Accepted: 22 July 2019
First Online: 14 August 2019
Compliance with ethical standards
: The author states that there is no conflict of interest.