Hubackova, S
Kucerova, A
Michlits, G
Kyjacova, L
Reinis, M
Korolov, O
Bartek, J
Hodny, Z
Article History
Received: 12 March 2015
Accepted: 23 March 2015
First Online: 18 May 2015
Competing interests
: The authors declare no conflict of interest.