Patoka, Jiří
Bláha, Martin
Kalous, Lukáš
Vrabec, Vladimír
Buřič, Miloš
Kouba, Antonín
Article History
Received: 9 December 2015
Accepted: 22 April 2016
First Online: 25 May 2016
Competing interests
: The authors declare no competing financial interests.