Damulewicz, Milena
Loboda, Agnieszka
Jozkowicz, Alicja
Dulak, Jozef
Pyza, Elzbieta
Article History
Received: 21 December 2016
Accepted: 30 May 2017
First Online: 12 July 2017
Competing Interests
: The authors declare that they have no competing interests.