Funding for this research was provided by:
Rector’s grant in the scientific research and development area. Silesian University of Technology (04/050/RGJ17/0048)
Article History
Received: 5 April 2018
Revised: 16 July 2018
Accepted: 26 July 2018
First Online: 6 August 2018
Compliance with Ethical Standards
:
: The authors have declared no conflict of interest.