Molasy, Milena
Walczak, Anna
Szaflik, Jerzy
Szaflik, Jacek P
Majsterek, Ireneusz
Article History
Received: 31 March 2016
Revised: 17 June 2016
Accepted: 20 June 2016
First Online: 14 July 2016
Competing interests
: The authors declare no conflict of interest.
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