Funding for this research was provided by:
Grantová Agentura České Republiky (P407/12/1939)
Vedecká Grantová Agentúra MŠVVaŠ SR a SAV (1/0440/15)
Article History
First Online: 22 October 2018
Compliance with Ethical Standards
:
: The authors declare that they have no conflict of interest.