Dobrzyńska, Joanna
Dąbrowska, Marzena
Olchowski, Rafał
Dobrowolski, Ryszard http://orcid.org/0000-0002-1625-5070
Funding for this research was provided by:
European Regional Development Fund (POIG.02.01.00-06-024/09)
Article History
Received: 6 September 2018
Accepted: 18 November 2018
First Online: 28 November 2018
Compliance with ethical standards
: The author(s) declare that they have no competing interests.