Marciniec, Rafał
Zięba, Emil
Winiarczyk, Krystyna
Funding for this research was provided by:
Maria Curie-Sklodowska University in Lublin
Article History
Received: 15 November 2018
Accepted: 20 February 2019
First Online: 9 March 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.