Breiter, Slawomir http://orcid.org/0000-0002-8561-9878
Langner, Krzysztof
Funding for this research was provided by:
Adam Mickiewicz University in Poznan
Article History
Received: 4 July 2018
Revised: 5 December 2018
Accepted: 22 January 2019
First Online: 15 February 2019
Compliance with ethical standards
:
: The authors S. Breiter and K. Langner declare that they have no conflict of interest.