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© 2017 Kuzemko Dorota, Baranowski Dariusz, Prystupa Andrzej, Fidor-Mikita Ewa, Lachowska-Kotowska Patrycja, Dzida Grzegorz, published by SciendoThis work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.