Brzozowska, Ewa
Pyra, Anna
Pawlik, Krzysztof
Janik, Monika
Górska, Sabina http://orcid.org/0000-0002-3206-0695
Urbańska, Natalia
Drulis-Kawa, Zuzanna http://orcid.org/0000-0002-4733-4660
Gamian, Andrzej
Article History
Received: 28 July 2017
Accepted: 6 December 2017
First Online: 22 December 2017
Competing Interests
: The authors declare that they have no competing interests.