Funding for this research was provided by:
National Research, Development and Innovation Fund (NN 116519, NN 128867, KH 129602)
EU and co-financed by the European Regional Development Fund (GINOP-2.3.2-15-2016-00008)
European Union and the European Social Fund (EFOP-3.6.1-16-2016-00022)
Text and Data Mining valid from 2019-02-13
Received: 5 December 2018
Revised: 28 December 2018
Accepted: 28 December 2018
First Online: 13 February 2019
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: This article does not contain any studies with human participants or animals performed by any of the authors.