Funding for this research was provided by:
Narodowe Centrum Nauki (DEC-2012/05/D/NZ6/00615)
Uniwersytet Medyczny im. Piastów Slaskich we Wroclawiu (Pbmn 191)
Text and Data Mining valid from 2018-11-03
Received: 30 August 2018
Accepted: 23 October 2018
First Online: 3 November 2018
Compliance with ethical standards
: On behalf of all authors, the corresponding author states that there is 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 standards.