Funding for this research was provided by:
Univerzita Palackého v Olomouci (IGA_PřF_2018_018)
Text and Data Mining valid from 2018-10-17
First Online: 17 October 2018
Compliance with Ethical Standards
: 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 research committee and with the 1964 Helsinki declaration and its amendments or comparable ethical standards.