Funding for this research was provided by:
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung (205321_163224)
Text and Data Mining valid from 2019-01-02
Received: 19 February 2018
Accepted: 10 December 2018
First Online: 2 January 2019
Compliance with ethical standards
: All the authors declare that they have 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 individuals included in the study.