Kovács, Attila http://orcid.org/0000-0001-8169-3547
Varga, Zoltán
Article History
Received: 24 November 2020
Accepted: 21 December 2020
First Online: 29 January 2021
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: The ethical standards have been met.