Funding for this research was provided by:
Agentúra Ministerstva Školstva, Vedy, Výskumu a Športu SR (1/0849/18)
Agentúra na Podporu Výskumu a Vývoja (APVV-15-0156)
Received: 1 February 2019
Accepted: 18 June 2020
First Online: 23 June 2020
Compliance with ethical standards
: The authors declare that they have no conflict of interest.