Stefanowicz, Magdalena
NikoĊajuk, Agnieszka
Matulewicz, Natalia
Karczewska-Kupczewska, Monika http://orcid.org/0000-0003-1396-4290
Article History
Received: 6 October 2017
Accepted: 19 January 2018
First Online: 7 February 2018
Compliance with ethical standards
:
: The authors declare 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.