Funding for this research was provided by:
Vedecká grantová agentúra MS SR (VEGA 1/0174/19, VEGA 1/0043/18)
Text and Data Mining valid from 2019-06-01
Received: 8 May 2019
Accepted: 28 May 2019
First Online: 1 June 2019
Compliance with ethical standards
: All authors declare that they have no conflict of interest.
: All the procedures performed in studies involving human participants were conducted in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants included in the study.