Jamka, Małgorzata
Woźniewicz, Małgorzata
Jeszka, Jan
Mardas, Marcin
Bogdański, Paweł
Stelmach-Mardas, Marta
Article History
Received: 24 February 2015
Accepted: 5 October 2015
First Online: 6 November 2015
Competing interests
: The authors declare no competing financial interests.