Žigrai, Miroslav
Smetanová, Viera
Gmitterová, Karin
Klepancová, Petra
Vyskočil, Milan
Article History
Received: 30 September 2019
Revised: 6 February 2020
Accepted: 18 February 2020
First Online: 2 March 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.