Document is current

Article History

First Online: 7 March 2019

Compliance with ethical guidelines

:

: None of the authors (I. Adamec and M. Habek) have relevant affiliations or financial involvement with any organization or entity with a financial interest in or financial conflict with the subject matter or materials discussed in the manuscript. This includes employment, consultancies, honoraria, stock ownership or options, expert testimony, grants or patents received or pending, or royalties. No writing assistance was used in the production of this manuscript.

: This article does not contain any studies with human participants or animals performed by any of the authors.