Zahorakova, Daniela
Lelkova, Petra
Gregor, Vladimir
Magner, Martin
Zeman, Jiri
Martasek, Pavel
Article History
Received: 12 October 2015
Revised: 6 January 2016
Accepted: 15 February 2016
First Online: 17 March 2016
Competing interests
: The authors declare no conflict of interest.
Free to read: This content has been made available to all.