Ciach, Michał http://orcid.org/0000-0002-5619-9747
Pęksa, Łukasz
Article History
Received: 30 October 2017
Revised: 20 June 2018
Accepted: 19 September 2018
First Online: 2 October 2018
Compliance with ethical standards
:
: The authors declare that they have no competing interests.
: The study was performed in accordance with the law regulations in Poland.