Zídka, Michal http://orcid.org/0000-0001-8753-9794
Džupa, Valér
Article History
Received: 6 November 2018
First Online: 1 April 2019
Compliance with ethical standards
:
: Michal Zídka and Valér Džupa declare that they have no conflict of interest and had gained no benefits concerning the study.
: This article does not contain any studies with human participants or animals performed by any of the authors.