Opaliński, Łukasz
Sokołowska-Wędzina, Aleksandra
Szczepara, Martyna
Zakrzewska, Małgorzata
Otlewski, Jacek
Article History
Received: 28 November 2016
Accepted: 27 June 2017
First Online: 2 August 2017
Competing Interests
: The authors declare that they have no competing interests.