Lesna, I Kralova
Cejkova, S
Kralova, A
Fronek, J
Petras, M
Sekerkova, A
Thieme, F
Janousek, L
Poledne, R
Article History
Received: 23 November 2016
Revised: 22 February 2017
Accepted: 26 February 2017
First Online: 10 April 2017
Competing interests
: The authors declare no conflict of interest.