Funding for this research was provided by:
The study was supported in part by a research grant of the Research Committee of the University of Thessaly, Greece (Code: 5287). (5287)
Text and Data Mining valid from 2019-03-16
Received: 13 November 2018
Accepted: 5 March 2019
First Online: 16 March 2019
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were 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.