Krzyżanowska, Patrycja
Pogorzelski, Andrzej
Skorupa, Wojciech
Moczko, Jerzy
Grebowiec, Philip
Walkowiak, Jarosław
Article History
Received: 9 January 2015
Accepted: 13 May 2015
First Online: 10 July 2015
Competing interests
: The authors declare no competing financial interests.