Kaspar, Petr
Zikova, Martina
Bartunek, Petr
Sterba, Jaroslav
Strnad, Hynek
Kren, Leos
Sedlacek, Radislav
Article History
Received: 13 April 2015
Accepted: 14 September 2015
First Online: 14 October 2015
Competing interests
: The authors declare no competing financial interests.