Perfilieva, Irina http://orcid.org/0000-0003-1531-1111
Vlašánek, Pavel
Article History
First Online: 23 October 2018
Compliance with ethical standards
:
: Authors Irina Perfilieva and Pavel Vlašánek declare that they have no conflict of interest.
: This article does not contain any studies with human participants or animals performed by any of the authors.