Funding for this research was provided by:
Text and Data Mining valid from 2020-02-07
Received: 21 August 2019
Accepted: 21 January 2020
First Online: 7 February 2020
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: Not applicable.
: All the patients were informed about the purposes of the study and consequently have signed their “consent of the patient.” All investigations conformed to the principles outlined in the Declaration of Helsinki and were performed with permission given by the Senate Ethics Committee for Scientific Research at the University School of Physical Education in Wrocław.