Funding for this research was provided by:
Slovak Scientific Grant Agency (VEGA 1/0286/17)
Article History
Received: 6 July 2018
Revised: 8 February 2019
Accepted: 11 February 2019
First Online: 20 February 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: This article does not contain any studies of human participants or animals performed by any of the authors.