Funding for this research was provided by:
Unitatea Executiva pentru Finantarea Invatamantului Superior, a Cercetarii, Dezvoltarii si Inovarii (PN-II-RU-TE-2014-4-0398)
Text and Data Mining valid from 2019-11-13
First Online: 13 November 2019
Compliance with Ethical Standards
: On behalf of all authors, the corresponding author states that there is no conflict of interest.