Ładniak, Agata http://orcid.org/0000-0001-6859-531X
Jurak, Małgorzata http://orcid.org/0000-0002-5365-7677
Wiącek, Agnieszka Ewa http://orcid.org/0000-0002-7425-9694
Article History
Received: 3 December 2018
Revised: 6 February 2019
Accepted: 7 February 2019
First Online: 19 February 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.