Chajduk, Ewelina
Kalbarczyk, Paweł
Polkowska-Motrenko, Halina
Stobiński, Leszek
Article History
Received: 16 August 2018
First Online: 30 November 2018
Compliance with ethical standards
:
: Ewelina Chajduk declares that she has no conflict of interest. Paweł Kalbarczyk declares that she has no conflict of interest. Halina Polkowska-Motrenko declares that she has no conflict of interest. Leszek Stobiński declares that she has no conflict of interest.
: This article does not contain any studies with human participants or animals performed by any of the authors.
: Informed consent was obtained from all individual participants included in the study. The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.