Krok, Dariusz http://orcid.org/0000-0002-1034-0944
Funding for this research was provided by:
University of Opole
Article History
First Online: 8 August 2020
Compliance with Ethical Standards
:
: The authors state that there are no competing interests.
: The study was conducted with the principles for research ethics required by The University Ethics Committee which approved the study: IEC - IP UO/07/10/2016. The study is also compliant with the 1964 Declaration of Helsinki and its later addenda.
: The permission was obtained from research participants prior to completing questionnaires.