Aleksandra Janowiak-Majeranowska1, Alan Majeranowski2,3. 1. Department of Otolaryngology, Medical University of Gdańsk, Gdańsk, Poland. 2. Department of Hematology and Transplantology, Medical University of Gdańsk, Gdańsk, Poland. a.majeranowski@gumed.edu.pl. 3. Department of Cell Biology and Immunology, Intercollegiate Faculty of Biotechnology, University of Gdańsk and Medical University of Gdańsk, ul.Smoluchowskiego 17, 80-214, Gdańsk, Poland. a.majeranowski@gumed.edu.pl.