Bruhn-Olszewska, Bożena
Korzon-Burakowska, Anna
Węgrzyn, Grzegorz
Jakóbkiewicz-Banecka, Joanna
Article History
Received: 30 September 2016
Accepted: 3 March 2017
First Online: 29 March 2017
Competing Interests
: The authors declare that they have no competing interests.