Article History
Received: 20 February 2018
Accepted: 9 August 2018
First Online: 20 August 2018
Compliance with Ethical Standards
:
: Ilona Sadok declares that she has no conflict of interest. Anna Stachniuk declares that she has no conflict of interest. Magdalena Staniszewska 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 is not applicable in this study.