Funding for this research was provided by:
Vedecká Grantová Agentúra MŠVVaŠ SR a SAV (1/0610/16)
Received: 13 February 2020
Accepted: 8 August 2020
First Online: 13 August 2020
Ethics approval and consent to participate
: Informed consent was obtained from all individual participants included in the study. All ethical guidelines were in accordance with established ethical standards as stated in the Declaration of Helsinki.
: The authors declare that they have no competing interests.