Stelmach-Mardas, Marta
Mardas, Marcin
Warchoł, Wojciech
Jamka, Małgorzata
Walkowiak, Jarosław
Article History
Received: 29 April 2014
Accepted: 21 August 2014
First Online: 14 October 2014
Competing interests
: The authors declare no competing financial interests.