Biskup, Małgorzata http://orcid.org/0000-0003-3096-8883
Biskup, Wojciech http://orcid.org/0000-0003-4307-6673
Majdan, Maria http://orcid.org/0000-0002-4345-1675
Targońska-Stępniak, Bożena http://orcid.org/0000-0003-3916-4291
Article History
Received: 8 April 2018
Accepted: 14 May 2018
First Online: 17 May 2018
Compliance with ethical standards
:
: All authors declared that they have 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 ethical standards.
: Informed consent was obtained from all individual participants included in the study.