Jachuła, Jacek
Konarska, Agata
Denisow, Bożena
Funding for this research was provided by:
the Ministry of Science and Higher Education of Poland (OKB/DS/2, OKB/DS/8, OKB/MN/6)
Article History
Received: 21 February 2018
Accepted: 23 May 2018
First Online: 3 June 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.