Piwowarczyk, Barbara
Tokarz, Krzysztof http://orcid.org/0000-0002-4937-1166
Muszyńska, Ewa
Makowski, Wojciech
Jędrzejczyk, Roman
Gajewski, Zbigniew
Hanus-Fajerska, Ewa
Article History
Received: 4 August 2017
Accepted: 30 April 2018
First Online: 7 May 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.