Fiedoruk, Krzysztof
Drewnowska, Justyna M.
Daniluk, Tamara
Leszczynska, Katarzyna
Iwaniuk, Piotr
Swiecicka, Izabela
Article History
Received: 16 December 2016
Accepted: 8 March 2017
First Online: 13 April 2017
Competing interests
: The authors declare no competing financial interests.