Strzelecka, Jolanta
Skadorwa, Tymon
Franckiewicz, Milena
Jóźwiak, Sergiusz
Article History
Received: 8 May 2018
Accepted: 9 July 2018
First Online: 17 July 2018
Compliance with ethical standards
:
: The authors declare that that the study complies with the current law in Poland.
: The authors declare that they have no conflict of interest.