Klesiewicz, Karolina
Karczewska, Elżbieta
Budak, Alicja
Marona, Henryk
Szkaradek, Natalia
Article History
Received: 21 May 2015
Revised: 19 January 2016
Accepted: 23 February 2016
First Online: 30 March 2016
Competing interests
: The authors declare no conflict of interest.
Free to read: This content has been made available to all.