Petrák, O
Zelinka, T
Štrauch, B
Rosa, J
Šomlóová, Z
Indra, T
Turková, H
Holaj, R
Widimský, J Jr
Article History
Received: 19 November 2014
Revised: 1 February 2015
Accepted: 17 February 2015
First Online: 2 April 2015
Competing interests
: The authors declare no conflict of interest.