Funding for this research was provided by:
Office of Research Hochschule Luzern (n/a)
Text and Data Mining valid from 2019-05-06
Received: 22 December 2018
Accepted: 26 April 2019
First Online: 6 May 2019
Compliance with ethical standards
: The authors declare this work has no conflict of interest either personally or financially.
: The authors approved the consent for publishing the manuscript.
: Data analyzed in this study are presented in the main manuscript and in supplemental files. Other data files are available in the Lucerne Open Repository (LORY) zenodo.org/communities/lory/.
: The authors have read and agreed to the ethics for publishing the manuscript.