Šubr, Martin
Petr, Martin
Kylián, Ondřej
Štěpánek, Josef
Veis, Martin
Procházka, Marek
Article History
Received: 28 December 2016
Accepted: 17 May 2017
First Online: 27 June 2017
Competing Interests
: The authors declare that they have no competing interests.