Bielak, Elżbieta http://orcid.org/0000-0003-0904-3659
Marcinkowska, Ewa http://orcid.org/0000-0002-1481-0229
Syguła-Cholewińska, Justyna http://orcid.org/0000-0002-1168-3252
Article History
Received: 2 October 2019
Accepted: 22 January 2020
First Online: 26 February 2020
Competing interests
: The authors declare no competing interests.