Funding for this research was provided by:
Uniwersytet Łódzki (B1611000000201.01)
Text and Data Mining valid from 2019-01-04
Received: 27 February 2018
Accepted: 25 October 2018
First Online: 4 January 2019
Compliance with ethical standards
: Authors declare that they have no conflict of interest.
: The University of Lodz granted Ethical approval to carry out the study within its facilities (Ethical Application Ref: RNN/194/12/KE).