Vejpravova, Jana
Pacakova, Barbara
Endres, Jan
Mantlikova, Alice
Verhagen, Tim
Vales, Vaclav
Frank, Otakar
Kalbac, Martin
Article History
Received: 16 June 2015
Accepted: 16 September 2015
First Online: 4 November 2015
Competing interests
: The authors declare no competing financial interests.