Zahradník, J.
Čížková, H.
Bina, C. R.
Sokos, E.
Janský, J.
Tavera, H.
Carvalho, J.
Article History
Received: 18 August 2016
Accepted: 20 February 2017
First Online: 31 March 2017
Competing interests
: The authors declare no competing financial interests.