Grega, Dominik http://orcid.org/0000-0001-5336-3794
Kolář, Jozef http://orcid.org/0000-0001-9046-3583
Article History
Received: 29 October 2018
First Online: 30 March 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.