Surmacz-Chwedoruk, Weronika
Babenko, Viktoria
Dec, Robert
Szymczak, Piotr
Dzwolak, Wojciech
Article History
Received: 7 January 2016
Accepted: 2 August 2016
First Online: 25 August 2016
Competing interests
: The authors declare no competing financial interests.