Chovanec, Michal
Cierna, Zuzana
Miskovska, Viera
Machalekova, Katarina
Kalavska, Katarina
Rejlekova, Katarina
Svetlovska, Daniela
Macak, Dusan
Spanik, Stanislav
Kajo, Karol
Babal, Pavel
De Giorgi, Ugo
Mego, Michal
Mardiak, Jozef
Article History
Received: 20 October 2017
Revised: 22 November 2017
Accepted: 23 November 2017
First Online: 27 February 2018
Change Date: 20 March 2018
Change Type: Update
Change Details: This paper was modified 12 months after initial publication to switch to Creative Commons licence terms, as noted at publication
Competing interests
: The authors declare no conflict of interest.