Szymański, Kazimierz
Janowska, Beata
Iżewska, Anna
Sidełko, Robert
Siebielska, Izabela
Funding for this research was provided by:
statutory research (504.01.15)
Article History
Received: 30 June 2017
Accepted: 31 May 2018
First Online: 20 June 2018
Compliance with ethical standards
: The present research is part of the project no. 504.01.15 (statutory research).
: The authors declare that they have no conflict of interest.
: This paper 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.