Funding for this research was provided by:
Agentúra Ministerstva Školstva, Vedy, Výskumu a Športu SR (APVV-15-0053)
Ministerstvo školstva, vedy, výskumu a športu Slovenskej republiky (VEGA 1/0026/18, VEGA 1/0686/17)
Article History
Received: 22 February 2019
Accepted: 9 April 2019
First Online: 16 April 2019
Compliance with ethical standards
:
: On behalf of all authors, the corresponding author states that there is no conflict of interest.