Funding for this research was provided by:
The John Paul II Catholic University of Lublin
Article History
First Online: 16 April 2019
Compliance with Ethical Standards
:
: 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 ethical standards.
: Informed consent was obtained from all individual participants included in the study.
: The authors have no competing interests to declare.