Funding for this research was provided by:
National Science Center, Poland (2011/01/N/NZ1/01569)
Text and Data Mining valid from 2018-12-11
First Online: 11 December 2018
Compliance with Ethical Standards
: The authors declare no conflict of interest.
: This article does not contain any studies with human participants or animals performed by any of the authors.
: Informed consent was obtained from all individual participants included in the study.