Boratyński, Filip http://orcid.org/0000-0002-3216-9527
Janik-Polanowicz, Agata
Szczepańska, Ewa
Olejniczak, Teresa
Article History
Received: 3 October 2017
Accepted: 18 December 2017
First Online: 11 January 2018
Competing Interests
: The authors declare that they have no competing interests.